CVE-2024-25637

References

Credits to:

• Mayank Mehra

For more information

If you have any questions or comments about this advisory:

• Email us at [email protected]

The X-October-Request-Handler Header does not sanitize the AJAX handler name and allows unescaped HTML to be reflected back. There is no impact since this vulnerability cannot be exploited through normal browser interactions. This unescaped value is only detectable when using a proxy interception tool.

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2024-25637 has a CVSS score of 3.1 (Low). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.5.15); upgrading removes the vulnerable code path.

Kodem intelligence

This issue has been patched in v3.5.15.

1. What is CVE-2024-25637? CVE-2024-25637 is a low-severity cross-site scripting (XSS) vulnerability in october/system (composer), affecting versions >= 3.2, < 3.5.15. It is fixed in 3.5.15. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
2. How severe is CVE-2024-25637? CVE-2024-25637 has a CVSS score of 3.1 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of october/system are affected by CVE-2024-25637? october/system (composer) versions >= 3.2, < 3.5.15 is affected.
4. Is there a fix for CVE-2024-25637? Yes. CVE-2024-25637 is fixed in 3.5.15. Upgrade to this version or later.
5. Is CVE-2024-25637 exploitable, and should I be worried? Whether CVE-2024-25637 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2024-25637 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2024-25637? Upgrade october/system to 3.5.15 or later.