How severe is CVE-2025-27405?

CVE-2025-27405 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-27405 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27405?

CVE-2025-27405 affects Icinga Icinga Web 2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27405?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-27405 have an EU (EUVD) identifier?

Yes. CVE-2025-27405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8216.

When was CVE-2025-27405 published?

CVE-2025-27405 was published on 2025-03-26 and last updated on 2026-06-17.

CVE-2025-27405

CVE-2025-27405 is a high-severity vulnerability in Icinga Icinga Web 2 with a CVSS 3.x base score of 7.6. 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: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8216
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 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.

Frequently asked questions

What is CVE-2025-27405?: 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.
How severe is CVE-2025-27405?: CVE-2025-27405 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-27405 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27405?: CVE-2025-27405 affects Icinga Icinga Web 2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27405?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-27405 have an EU (EUVD) identifier?: Yes. CVE-2025-27405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8216.
When was CVE-2025-27405 published?: CVE-2025-27405 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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