CVE-2025-27404: icinga web 2 XSS — Fix

Description

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. A vulnerability in versions prior to 2.11.5 and 2.12.13 allows an attacker to craft a URL that, once visited by any user, allows to embed arbitrary Javascript into Icinga Web and to act on behalf of that user. This issue has been resolved in versions 2.11.5 and 2.12.3 of Icinga Web 2. As a workaround, those who have Icinga Web 2.12.2 may enable a content security policy in the application settings.

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CVSS v3.1 Score

7.6

HIGH

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
icinga	icinga_web_2	< 2.11.5
icinga	icinga_web_2	2.12.0 — 2.12.3

References

Advisories & Patches

https://github.com/Icinga/icingaweb2/security/advisories/GHSA-c6pg-h955-wf66

Other References

https://github.com/Icinga/icingaweb2/releases/tag/v2.11.5 https://github.com/Icinga/icingaweb2/releases/tag/v2.12.3

Frequently Asked Questions

What is CVE-2025-27404? +

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. A vulnerability in versions prior to 2.11.5 and 2.12.13 allows an attacker to craft a URL that, once visited by any user, allows to embed arbitrary Javascript into Icinga Web and to act on behalf of that user. This issue has been resolved in versions 2.11.5 and 2.12.3 of Icinga Web 2. As a workaround, those who have Icinga Web 2.12.2 may enable a content security policy in the application settings. It has a CVSS v3.1 base score of 7.6 (HIGH).

How severe is CVE-2025-27404? +

CVE-2025-27404 has a CVSS v3.1 score of 7.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-27404? +

CVE-2025-27404 affects products from icinga, specifically: icinga_web_2. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-27404? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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