CVE-2025-1011: firefox Code Injection — Fix

Description

A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-94 CWE-94

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 128.7.0
mozilla	firefox	< 135.0
mozilla	thunderbird	< 135.0
mozilla	thunderbird	128.0.1 — 128.7.0

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2025-07/ https://www.mozilla.org/security/advisories/mfsa2025-09/ https://www.mozilla.org/security/advisories/mfsa2025-10/ https://www.mozilla.org/security/advisories/mfsa2025-11/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1936454 https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

Frequently Asked Questions

What is CVE-2025-1011? +

A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-1011? +

CVE-2025-1011 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-1011? +

CVE-2025-1011 affects products from mozilla, specifically: firefox, thunderbird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-1011? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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