Skip to main content
CVE-2024-11695VulnerabilityPublished Updated

CVE-2024-11695: Mozilla Firefox · URL Bar Spoofing via Manipulated Punycode and Whitespace Characters

Affects Mozilla FirefoxSource CVE Database V5

0

Not known to be exploited · CVSS 5.4 Medium : upgrade to 133 or 128.5 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 133, 128.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Nov 2024

  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 to 133 or 128.5.

Affected software

ProductAffectedFixed in
Mozilla FirefoxAffected
  • <133
  • <128.5
Fixed in
  • 133
  • 128.5

AI-suggested

1. 2. Implement enterprise-wide browser update policies to ensure timely deployment of security patches. 3. Educate users about the risks of clicking suspicious links, especially those with unusual characters or scripts in URLs, emphasizing vigilance with emails and messages containing Arabic script or whitespace anomalies. 4. Deploy email filtering and web gateway solutions capable of detecting and blocking URLs with suspicious punycode or Unicode manipulations. 5. Utilize browser security features such as enhanced phishing protection and URL highlighting to help users identify potentially spoofed URLs. 6. Conduct phishing simulation exercises tailored to this vulnerability to raise awareness. 7. For critical systems, consider restricting browser usage to updated versions or alternative browsers until patches are confirmed. 8. Monitor network traffic for unusual URL patterns indicative of exploitation attempts. 9. Collaborate with incident response teams to prepare for potential phishing campaigns exploiting this vulnerability.

Description

A crafted URL containing Arabic script and whitespace characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

References

Community reviews

Loading reviews…