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{
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"schema_version": "1.4.0",
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"id": "GHSA-9rr5-q43r-ccv4",
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"modified": "2025-12-04T17:45:46Z",
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"published": "2022-05-24T17:21:03Z",
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"aliases": [
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"CVE-2017-18875"
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],
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"summary": "Mattermost Server does not prevent System Admin from arbitrary file creation",
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"details": "An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can create arbitrary files.",
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"severity": [
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{
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"type": "CVSS_V4",
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"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
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}
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],
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"affected": [
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{
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"package": {
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"ecosystem": "Go",
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"name": "github.com/mattermost/mattermost-server"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "0"
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},
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{
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"fixed": "4.1.2-0.20171004201910-6be8113eb60c"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "Go",
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"name": "github.com/mattermost/mattermost-server"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "4.2.0-rc1.0.20171004154238-fadd9514f6e7"
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},
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{
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"fixed": "4.2.1-0.20171004194140-6d3cb2ce07fc"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "Go",
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"name": "github.com/mattermost/mattermost-server"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "4.3.0-rc1"
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},
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{
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"fixed": "4.3.0"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"type": "ADVISORY",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18875"
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},
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{
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"type": "WEB",
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"url": "https://github.com/mattermost/mattermost/commit/6be8113eb60cf5ddd2dc1c3f4db05cae0c183086"
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},
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{
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"type": "WEB",
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"url": "https://github.com/mattermost/mattermost/commit/6d3cb2ce07fc799832081e93843b405b390057fa"
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},
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{
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"type": "WEB",
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"url": "https://github.com/mattermost/mattermost/commit/fadd9514f6e71590aba781a7035e1de4150137b0"
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},
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{
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"type": "PACKAGE",
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"url": "https://github.com/mattermost/mattermost"
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},
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{
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"type": "WEB",
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"url": "https://mattermost.com/security-updates"
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}
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],
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"database_specific": {
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"cwe_ids": [
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"CWE-22"
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],
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"severity": "MODERATE",
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"github_reviewed": true,
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"github_reviewed_at": "2025-12-04T17:45:46Z",
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"nvd_published_at": "2020-06-19T17:15:00Z"
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}
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}
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{
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"schema_version": "1.4.0",
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"id": "GHSA-hjqh-j6rj-gh8q",
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"modified": "2025-12-04T17:45:50Z",
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"published": "2022-05-24T17:21:03Z",
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"aliases": [
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"CVE-2017-18876"
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],
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"summary": "Mattermost Server is vulnerable to Path Traversal when files are stored locally",
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"details": "An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can test for the existence of an arbitrary file.",
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"severity": [
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{
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"type": "CVSS_V4",
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"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
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}
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],
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"affected": [
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{
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"package": {
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"ecosystem": "Go",
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"name": "github.com/mattermost/mattermost-server"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "0"
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},
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{
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"fixed": "4.1.2-0.20171004201910-6be8113eb60c"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "Go",
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"name": "github.com/mattermost/mattermost-server"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "4.2.0-rc1.0.20171004154238-fadd9514f6e7"
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},
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{
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"fixed": "4.2.1-0.20171004194140-6d3cb2ce07fc"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "Go",
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"name": "github.com/mattermost/mattermost-server"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "4.3.0-rc1"
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},
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{
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"fixed": "4.3.0"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"type": "ADVISORY",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18876"
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},
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{
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"type": "WEB",
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"url": "https://github.com/mattermost/mattermost/commit/6be8113eb60cf5ddd2dc1c3f4db05cae0c183086"
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},
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{
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"type": "WEB",
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"url": "https://github.com/mattermost/mattermost/commit/6d3cb2ce07fc799832081e93843b405b390057fa"
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},
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{
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"type": "WEB",
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"url": "https://github.com/mattermost/mattermost/commit/fadd9514f6e71590aba781a7035e1de4150137b0"
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},
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{
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"type": "PACKAGE",
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"url": "https://github.com/mattermost/mattermost"
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},
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{
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"type": "WEB",
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"url": "https://mattermost.com/security-updates"
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}
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],
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"database_specific": {
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"cwe_ids": [
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"CWE-22"
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],
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"severity": "MODERATE",
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"github_reviewed": true,
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"github_reviewed_at": "2025-12-04T17:45:50Z",
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"nvd_published_at": "2020-06-19T17:15:00Z"
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}
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}

advisories/unreviewed/2022/05/GHSA-9rr5-q43r-ccv4/GHSA-9rr5-q43r-ccv4.json

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advisories/unreviewed/2022/05/GHSA-hjqh-j6rj-gh8q/GHSA-hjqh-j6rj-gh8q.json

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