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CVE-2025-23109VulnerabilityPublished Updated

CVE-2025-23109: Mozilla Firefox for iOS · Vulnerability

Affects Mozilla Firefox for iOSSource CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium : upgrade to 134 when convenient.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 134
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Jan 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Upgrade Mozilla Firefox for iOS to 134.

Affected software

ProductAffectedFixed in
Mozilla Firefox for iOSAffected
  • <134
Fixed in
  • 134

AI-suggested

This vulnerability is fixed in Firefox for iOS version 134. Users and administrators should ensure that Firefox for iOS is updated to version 134 or later to mitigate this issue. No additional mitigation steps are required as the vendor has provided an official fix.

Description

Long hostnames in URLs could be leveraged to obscure the actual host of the website or spoof the website address. This vulnerability was fixed in Firefox for iOS 134.

References

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