CVE-2023-25731

Severity: high (CVSS 8.8 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 2026-06-17
Weakness: CWE-1284

Description

Due to URL previews in the network panel of developer tools improperly storing URLs, query parameters could potentially be used to overwrite global objects in privileged code. 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=1801542
https://www.mozilla.org/security/advisories/mfsa2023-05/
https://bugzilla.mozilla.org/show_bug.cgi?id=1801542
https://www.mozilla.org/security/advisories/mfsa2023-05/
https://bugzilla.mozilla.org/show_bug.cgi?id=1801542

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