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VulnerabilityPublished Updated

CVE-2025-23108: Mozilla Firefox for iOS · Cross-site Scripting

Affects Mozilla Firefox for iOSSource CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium : upgrade to 134 when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 15% 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:L/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 26 Oct 2026.

What to do

Upgrade Mozilla Firefox for iOS to 134.

Affected software

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

AI-suggested

Mozilla has fixed this vulnerability in Firefox for iOS version 134. Users and administrators should update to Firefox for iOS 134 or later to remediate this issue. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official update.

Description

Opening Javascript links in a new tab via long-press in the Firefox iOS client could result in a malicious script spoofing the URL of the new tab. This vulnerability was fixed in Firefox for iOS 134.

References

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