CVE-2025-48057CRITICAL 9.8EPSS p32.9%

CVE-2025-48057CVE-2025-48057

Description

Icinga 2 is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. Prior to versions 2.12.12, 2.13.12, and 2.14.6, the VerifyCertificate() function can be tricked into incorrectly treating certificates as valid. This allows an attacker to send a malicious certificate request that is then treated as a renewal of an already existing certificate, resulting in the attacker obtaining a valid certificate that can be used to impersonate trusted nodes. This only occurs when Icinga 2 is built with OpenSSL older than version 1.1.0. This issue has been patched in versions 2.12.12, 2.13.12, and 2.14.6.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.41% probability of exploitation · percentile 32.9% · 2026-06-18T12:00:27Z
Published2025-05-27
Last modified2025-12-05

Underlying weaknesses· 1

CWE-296

References

  1. https://github.com/Icinga/icinga2/commit/34c93a2542bbe4e9886d15bc17ec929ead1aa152
  2. https://github.com/Icinga/icinga2/commit/4023128be42b18a011dda71ddee9ca79955b89cb
  3. https://github.com/Icinga/icinga2/commit/60f75f4a3d5cbb234eb3694ba7e9076a1a5b8776
  4. https://github.com/Icinga/icinga2/commit/9ad5683aab9eb392c6737ff46c830a945c9e240f
  5. https://github.com/Icinga/icinga2/commit/9b2c05d0cc09210bdeade77cf9a73859250fc48d
  6. https://github.com/Icinga/icinga2/security/advisories/GHSA-7vcf-f5v9-3wr6

1

TypeTargetConfidenceTier
WeaknessImproper Following of a Certificate's Chain of Trustcwe-2960%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.