Description: Writing unvalidated base64 content directly to disk can allow path-based or storage abuse
if upstream 'response.contents' or 'fileName' are attacker-controlled; ensure 'fileName'
and content source are trusted and validated.
webdriver.js [1740-1744]

fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')

const zipData = fs.readFileSync(zipFilePath)

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Follow the guide to enable codebase context checks.

Objective: Ensure all identifiers clearly express their purpose and intent, making code
self-documenting

Status: Passed

Objective: To prevent the leakage of sensitive system information through error messages while
providing sufficient detail for internal debugging.

Status: Passed

Objective: To create a detailed and reliable record of critical system actions for security analysis
and compliance.

Status:
Missing audit logging: The new file write of decoded base64 content is not logged, so it’s unclear which
user/action triggered the write and its outcome.

fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')

const zipData = fs.readFileSync(zipFilePath)
await JSZip.loadAsync(zipData)

Objective: Ensure comprehensive error handling that provides meaningful context and graceful
degradation

Status:
Unhandled write errors: The direct call to fs.writeFileSync with base64 encoding lacks try/catch or error handling
for invalid base64, I/O failures, or permission issues.

fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')

const zipData = fs.readFileSync(zipFilePath)
await JSZip.loadAsync(zipData)

Objective: To ensure logs are useful for debugging and auditing without exposing sensitive
information like PII, PHI, or cardholder data.

Status:
No redaction assurance: Writing decoded content to disk may involve sensitive data, and there is no accompanying
structured logging or confirmation that sensitive content is not logged elsewhere.

fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')

const zipData = fs.readFileSync(zipFilePath)
await JSZip.loadAsync(zipData)

Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent
vulnerabilities

Status:
Unvalidated input: The base64 input from response.contents is written directly without validation of encoding
correctness, size limits, or path safety for targetDirectory/fileName.

const base64Content = response.contents

if (!targetDirectory.endsWith('/')) {
  targetDirectory += '/'
}

fs.mkdirSync(targetDirectory, { recursive: true })
const zipFilePath = path.join(targetDirectory, `${fileName}.zip`)
fs.writeFileSync(zipFilePath, base64Content, 'base64')

Replace the forEach loop with Promise.all and map to correctly await the
asynchronous file writing operations and prevent a race condition. Also, use
path.join for constructing file paths.

javascript/selenium-webdriver/lib/webdriver.js [1748-1752]

-Object.keys(zip.files).forEach(async (fileName) => {
-  const fileData = await zip.files[fileName].async('nodebuffer')
-  fs.writeFileSync(`${targetDirectory}/${fileName}`, fileData)
-  console.log(`File extracted: ${fileName}`)
-})
+await Promise.all(
+  Object.keys(zip.files).map(async (fileName) => {
+    const fileData = await zip.files[fileName].async('nodebuffer')
+    fs.writeFileSync(path.join(targetDirectory, fileName), fileData)
+    console.log(`File extracted: ${fileName}`)
+  }),
+)

[To ensure code accuracy, apply this suggestion manually]

Re-throw the error inside the .catch block to ensure that failures during the
unzipping process are propagated to the caller of the downloadFile function.

javascript/selenium-webdriver/lib/webdriver.js [1754-1756]

 .catch((error) => {
   console.error('Error unzipping file:', error)
+  throw error
 })

[To ensure code accuracy, apply this suggestion manually]

Improve efficiency by passing the base64Content string directly to
JSZip.loadAsync with the { base64: true } option, thus avoiding the unnecessary
step of writing to and reading from a temporary zip file.

javascript/selenium-webdriver/lib/webdriver.js [1742-1745]

-fs.writeFileSync(zipFilePath, base64Content, 'base64')
+// The zip file does not need to be written to disk.
+// fs.writeFileSync(zipFilePath, base64Content, 'base64')
 
-const zipData = fs.readFileSync(zipFilePath)
-await JSZip.loadAsync(zipData)
+// const zipData = fs.readFileSync(zipFilePath)
+await JSZip.loadAsync(base64Content, { base64: true })

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