CVE-2025-2866

EUVD-2025-12434
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
Affected Products (NVD)
VendorProductVersion
libreofficelibreoffice
24.8.0.1 ≤
𝑥
< 24.8.6.0
libreofficelibreoffice
25.2.0.1 ≤
𝑥
< 25.2.2
libreofficelibreoffice
24.8.0.0:alpha1
libreofficelibreoffice
24.8.0.0:beta1
libreofficelibreoffice
25.2.0.0:alpha1
libreofficelibreoffice
25.2.0.0:beta1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libreoffice
bookworm
4:7.4.7-1+deb12u10
fixed
bookworm (security)
4:7.4.7-1+deb12u8
fixed
bullseye
vulnerable
bullseye (security)
1:7.0.4-4+deb11u13
fixed
forky
4:26.2.0-1
fixed
sid
4:26.2.0-1
fixed
trixie
4:25.2.3-2+deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libreoffice
focal
Fixed 1:6.4.7-0ubuntu0.20.04.15
released
jammy
Fixed 1:7.3.7-0ubuntu0.22.04.10
released
noble
Fixed 4:24.2.7-0ubuntu0.24.04.4
released
oracular
Fixed 4:24.8.6-0ubuntu0.24.10.2
released
plucky
not-affected
Common Weakness Enumeration
References
https://www.libreoffice.org/about-us/security/advisories/cve-2025-2866
https://lists.debian.org/debian-lts-announce/2025/06/msg00002.html