How severe is CVE-2025-27609?

CVE-2025-27609 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-27609 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27609?

CVE-2025-27609 affects Icinga Icinga Web 2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27609?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-27609 have an EU (EUVD) identifier?

Yes. CVE-2025-27609 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8230.

When was CVE-2025-27609 published?

CVE-2025-27609 was published on 2025-03-26 and last updated on 2026-06-17.

CVE-2025-27609

CVE-2025-27609 is a medium-severity vulnerability in Icinga Icinga Web 2 with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 1.1
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8230
Weakness: CWE-79
Affected product: Icinga Icinga Web 2
Published: 2025-03-26
Last modified: 2026-06-17

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 request that, once transmitted to a victim's Icinga Web, allows to embed arbitrary Javascript into it 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. Any modern browser with a working CORS implementation also sufficiently guards against the vulnerability.

Frequently asked questions

What is CVE-2025-27609?: 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 request that, once transmitted to a victim's Icinga Web, allows to embed arbitrary Javascript into it 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. Any modern browser with a working CORS implementation also sufficiently guards against the vulnerability.
How severe is CVE-2025-27609?: CVE-2025-27609 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-27609 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27609?: CVE-2025-27609 affects Icinga Icinga Web 2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27609?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27609 have an EU (EUVD) identifier?: Yes. CVE-2025-27609 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8230.
When was CVE-2025-27609 published?: CVE-2025-27609 was published on 2025-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:icinga:icinga_web_2:*:*:*:*:*:*:*:*

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