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Vulnerabilities

Vulnerability · CVE-2025-46595

An XSS issue was discovered in the Flag module before 1.x-3.6.2 for Backdrop CMS.

Published Apr 25, 2025 · catalog updated Apr 25, 2025 · Flag

Check if you run it

No confirmed exploitation is on record for CVE-2025-46595. EPSS is 0.24%. Act only if a listed version of Flag is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Version ranges on file
Affected products
vendor backdropcms Flag 0 <1.x-3.6.2

An XSS issue was discovered in the Flag module before 1.x-3.6.2 for Backdrop CMS. Flag is a module that allows flags to be added to nodes, comments, users, and any other type of entity. It doesn't verify flag links before performing the flag action, or verify that the response returned was provided by the flag module. This can allow crafted HTML to result in Cross Site Scripting. This is mitigated by the fact that an attacker must have a role with permission to create links on the website, for example: create or edit comments or content with a filtered text format.

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 backdropcms Flag 0 <1.x-3.6.20 <1.x-3.6.2

How to fix CVE-2025-46595

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-2025-46595. EPSS is 0.24%. Act only if a listed version of Flag is installed.

Which versions are affected?

Compare what you have installed with backdropcms Flag 0 <1.x-3.6.2 0 <1.x-3.6.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.24%. 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. Apr 25, 2025 · EUVD

    Detected

    An XSS issue was discovered in the Flag module before 1.x-3.6.2 for Backdrop CMS. Flag is a module that allows flags to be added to nodes, comments, users, and any other type of entity. It doesn't verify flag links before performing the flag action, or verify that the response returned was provided by the flag module. This can allow crafted HTML to result in Cross Site Scripting. This is mitigated

  2. Apr 25, 2025 · EUVD

    Updated

    An XSS issue was discovered in the Flag module before 1.x-3.6.2 for Backdrop CMS. Flag is a module that allows flags to be added to nodes, comments, users, and any other type of entity. It doesn't verify flag links before performing the flag action, or verify that the response returned was provided by the flag module. This can allow crafted HTML to result in Cross Site Scripting. This is mitigated

Sources

  • CVE.orgVulnerability recordCVE-2025-46595

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-46595

    30-day exploitation probability 0.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-11964

    An XSS issue was discovered in the Flag module before 1.x-3.6.2 for Backdrop CMS. Flag is a module that allows flags to be added to nodes, comments, users, and any other type of entity. It doesn't verify flag links before performing the flag action, or verify that the response re

    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.