CVE-2025-27404Network attack vector

User-session hijacking via crafted URL DOM injection

Published Mar 26, 2025 · Updated Mar 26, 2025

DOM-based XSS in Icinga Web 2 before 2.11.5 and 2.12.0 through 2.12.2 allows attackers to execute JavaScript via a crafted URL. The vendor has not published the DOM source or sink; it states only that visiting the crafted URL embeds arbitrary JavaScript into Icinga Web. The vendor assessment requires high-privileged attacker access and a user visit, after which the script can act with that user's session authority.

CVSS severity7.6
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Icinga Web 2 before 2.11.5 and 2.12.0 through 2.12.2 allows attackers to execute JavaScript via a crafted URL. The vendor has not published the DOM source or sink; it states only that visiting the crafted URL embeds arbitrary JavaScript into Icinga Web. The vendor assessment requires high-privileged attacker access and a user visit, after which the script can act with that user's session authority.

The record

CVE
CVE-2025-27404
Published
Mar 26, 2025
Updated
Mar 26, 2025
Vendor
Icinga
Product
Icinga Web 2
Classifications
CWE-79, CWE-80, T1204.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.11.5
  2. Affected versionversion=>= 2.12.0, < 2.12.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Icinga · Icinga Web 2version=< 2.11.5; version=>= 2.12.0, < 2.12.3

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.6GitHubCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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