Medium severity · published Apr 27, 2025
CVE-2025-2866
PDF signature forgery with adbe.pkcs7.sha1 SubFilter
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
LibreOffice · The Document Foundation
24.8 before < 24.8.6; 25.2 before < 25.2.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-2866
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-2866
Vendor Advisory
https://www.libreoffice.org/about-us/security/advisories/cve-2025-2866
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/06/msg00002.html
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