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Vulnerability record · CVE-2025-48057 · published 27 May 2025

CVE-2025-48057: Icinga vulnerability

Icinga · Icinga

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.

9.3 CVSS 4.0 Critical EPSS 0.44% · top 64.0% CWE-296 · CWE-296
9.3CVSS 4.0 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Icinga/icinga2/commit/34c93a2542bbe4e9886d15bc17ec929ead1aa152 Patch
https://github.com/Icinga/icinga2/commit/4023128be42b18a011dda71ddee9ca79955b89cb Patch
https://github.com/Icinga/icinga2/commit/60f75f4a3d5cbb234eb3694ba7e9076a1a5b8776 Patch
https://github.com/Icinga/icinga2/commit/9ad5683aab9eb392c6737ff46c830a945c9e240f Patch
https://github.com/Icinga/icinga2/commit/9b2c05d0cc09210bdeade77cf9a73859250fc48d Patch
https://github.com/Icinga/icinga2/security/advisories/GHSA-7vcf-f5v9-3wr6 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-49369Icinga improper certificate validation vulnerabilityIcinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for repor…EPSS 2.9%9.1CVE-2020-29663Icinga improper certificate validation vulnerabilityIcinga 2 v2.8.0 through v2.11.7 and v2.12.2 has an issue where revoked certificates due for renewal will automatically be renewed, ignoring the CRL. …EPSS 1.6%8.8CVE-2021-32743Icinga vulnerabilityIcinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for repor…EPSS 1.8%8.8CVE-2021-32739Icinga improper privilege management vulnerabilityIcinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for repor…EPSS 1.1%8.3CVE-2024-24820Icinga cross-site request forgery vulnerabilityIcinga Director is a tool designed to make Icinga 2 configuration handling easy. Not any of Icinga Director's configuration forms used to manipulate …EPSS 0.40%8.1CVE-2018-6535Icinga vulnerabilityAn issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacke…EPSS 1.3%7.8CVE-2020-14004Icinga link following vulnerabilityAn issue was discovered in Icinga2 before v2.12.0-rc1. The prepare-dirs script (run as part of the icinga2 systemd service) executes chmod 2750 /run/…EPSS 0.74%7.8CVE-2018-6533Icinga vulnerabilityAn issue was discovered in Icinga 2.x through 2.8.1. By editing the init.conf file, Icinga 2 can be run as root. Following this the program can be us…EPSS 0.39%

Source: NIST National Vulnerability Database (record CVE-2025-48057), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.