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VulnerabilityPublished Updated

CVE-2024-10461: Mozilla Firefox · Cross-site Scripting

Affects Mozilla FirefoxSource CVE Database V5

0

Not known to be exploited · CVSS 6.1 Medium : upgrade to 132 or 128.4 when convenient.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 132, 128.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade Mozilla Firefox to 132 or 128.4.

Affected software

ProductAffectedFixed in
Mozilla FirefoxAffected
  • <132
  • <128.4
Fixed in
  • 132
  • 128.4

AI-suggested

1. 2. If you cannot patch yet, implement strict Content Security Policies (CSP) to restrict the execution of inline scripts and untrusted content in browsers. 3. Educate users to avoid clicking on suspicious links or opening unexpected emails, especially those containing multipart content. 4. Use network security controls such as web proxies or email gateways to detect and block suspicious multipart/x-mixed-replace responses. 5. Monitor browser and email client logs for unusual activity or script execution anomalies. 6. Employ endpoint detection and response (EDR) tools to identify exploitation attempts. 7. Coordinate with IT and security teams to prioritize patch management for Mozilla products. 8. Consider disabling or restricting the use of multipart/x-mixed-replace content types if feasible in organizational policies. These steps go beyond generic advice by focusing on interim controls and user awareness until official patches are deployed.

Description

In multipart/x-mixed-replace responses, `Content-Disposition: attachment` in the response header was not respected and did not force a download, which could allow XSS attacks. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.

References

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