LibreOffice PDF Sign Spoofing via adbe.pkcs7.sha1 – 24.8 < 24.8.6, 25.2 < 25.2.2
CVE-2025-2866 Published on April 27, 2025
PDF signature forgery with adbe.pkcs7.sha1 SubFilter
Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by Improper Validation.
In the affected versions of LibreOffice a flaw in the verification code for adbe.pkcs7.sha1 signatures could cause invalid signatures to be accepted as valid
This issue affects LibreOffice: from 24.8 before < 24.8.6, from 25.2 before < 25.2.2.
Vulnerability Analysis
CVE-2025-2866 is exploitable with local system access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Improper Verification of Cryptographic Signature
The software does not verify, or incorrectly verifies, the cryptographic signature for data.
Products Associated with CVE-2025-2866
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Affected Versions
The Document Foundation LibreOffice:- Version 24.8 and below < 24.8.6 is affected.
- Version 25.2 and below < 25.2.2 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.