CVE-2022-34471: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

When downloading an update for an addon, the downloaded addon update's version was not verified to match the version selected from the manifest. If the manifest had been tampered with on the server, an attacker could trick the browser into downgrading the addon to a prior version. This vulnerability affects Firefox < 102.

Affected products

• Mozilla Firefox: before 102.0 (fixed in 102.0)

Published 2022-12-22. Last modified 2026-06-17.