What’s Vulnerable › Vulnerabilities

CVE-2023-25752

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-02 · updated 2026-10-24

Description

When accessing throttled streams, the count of available bytes needed to be checked in the calling function to be within bounds. This may have lead future code to be incorrect and vulnerable. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.

Affected products

• Mozilla Firefox: before 111.0 — fixed in 111.0
• Mozilla Firefox ESR: before 102.9 — fixed in 102.9
• Mozilla Thunderbird: before 102.9 — fixed in 102.9

How to fix

Upgrade to a fixed version: Mozilla Firefox 111.0; Mozilla Firefox ESR 102.9; Mozilla Thunderbird 102.9. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1811627
• https://www.mozilla.org/security/advisories/mfsa2023-09/
• https://www.mozilla.org/security/advisories/mfsa2023-10/
• https://www.mozilla.org/security/advisories/mfsa2023-11/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1811627
• https://www.mozilla.org/security/advisories/mfsa2023-09/
• https://www.mozilla.org/security/advisories/mfsa2023-10/
• https://www.mozilla.org/security/advisories/mfsa2023-11/

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