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Page Compare Reflected Cross-site Scripting (XSS) vulnerability

Moderate severity GitHub Reviewed Published Apr 20, 2022 in Adobe-Consulting-Services/acs-aem-commons • Updated Jan 27, 2023

Package

maven com.adobe.acs:acs-aem-commons (Maven)

Affected versions

< 5.2.0

Patched versions

5.2.0

Description

Impact

ACS Commons version 5.1.x (and earlier) suffers from a Reflected Cross-site Scripting (XSS) vulnerability in /apps/acs-commons/content/page-compare.html endpoint via the a and b GET parameters. User input submitted via these parameters is not validated or sanitized.

An attacker must provide a link to someone with access to AEM Author, and could potentially exploit this vulnerability to inject malicious JavaScript content into vulnerable form fields and execute it within the context of the victim's browser. The exploitation of this issue requires user interaction in order to be successful.

Patches

This issue has been resolved in 5.2.0.

Workarounds

None

References

N/A

For more information

If you have any questions or comments about this advisory open an issue in acs-aem-commons.

Credit

This issue was discovered and reported by Black Lantern Security.

https://hackerone.com/reports/1466020

References

@davidjgonzalez davidjgonzalez published to Adobe-Consulting-Services/acs-aem-commons Apr 20, 2022
Published by the National Vulnerability Database Apr 21, 2022
Published to the GitHub Advisory Database Apr 26, 2022
Reviewed Apr 26, 2022
Last updated Jan 27, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(79th percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2022-28820

GHSA ID

GHSA-w5m2-299g-rff5

Source code

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