CVE-2024-53975

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-26 · updated 2026-06-17

Description

Accessing a non-secure HTTP site that uses a non-existent port may cause the SSL padlock icon in the location URL bar to, misleadingly, appear secure. This vulnerability affects Firefox for iOS < 133.

Affected products

Mozilla Firefox: before 133.0 — fixed in 133.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 133.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1843467
https://www.mozilla.org/security/advisories/mfsa2024-66/

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