What’s Vulnerable › Vulnerabilities

CVE-2023-25736

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-19 · updated 2026-06-17

Description

An invalid downcast from `nsHTMLDocument` to `nsIContent` could have lead to undefined behavior. This vulnerability affects Firefox < 110.

Affected products

• Mozilla Firefox: before 110.0 — fixed in 110.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 110.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1811331
• https://www.mozilla.org/security/advisories/mfsa2023-05/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1811331
• https://www.mozilla.org/security/advisories/mfsa2023-05/

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