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Vulnerabilities

Vulnerability · CVE-2025-4805

A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration.

Published May 16, 2025 · catalog updated Aug 8, 2026 · WatchGuard Fireware OS

Check if you run it

No confirmed exploitation is on record for CVE-2025-4805. EPSS is 0.57%. Act only if a listed version of WatchGuard Fireware OS is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Version ranges on file
Affected products
vendor WatchGuard Fireware OS 12.0 <12.11.2

A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor WatchGuard Fireware OS 12.0 <12.11.212.0 <12.11.2

How to fix CVE-2025-4805

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-4805. EPSS is 0.57%. Act only if a listed version of WatchGuard Fireware OS is installed.

Which versions are affected?

Compare what you have installed with WatchGuard Fireware OS 12.0 <12.11.2 12.0 <12.11.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 16, 2025 · EUVD

    Detected

    A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.

  2. Aug 8, 2026 · EUVD

    Updated

    A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScript code in the Firebox management interface of another management user.

Sources

  • CVE.orgVulnerability recordCVE-2025-4805

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-4805

    30-day exploitation probability 0.6%

    first.org
  • EUVDVulnerability recordEUVD-2025-15548

    A stored cross-site scripting (XSS) vulnerability exists in the management interface of WatchGuard Firebox appliances via the Access Portal configuration. An authenticated remote attacker with administrator privileges could exploit this vulnerability to execute arbitrary JavaScri

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.