CVE-2021-25635
MEDIUM EPSS 3.3%
Published Mar 21, 20251y ago · Modified Jun 17, 20261w ago
5.2 CVSS 4.0
Published Mar 21, 2025 1y ago
Last Modified Jun 17, 2026 1w ago
Description
An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to self sign an ODF document, with a signature untrusted by the target, then modify it to change the signature algorithm to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H/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:X/V:X/RE:X/U:X Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction P
Scope X
Threat Intelligence
EPSS Exploit Probability
3.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-295
Affected Products 2
| Vendor | Product | Version | Range |
|---|---|---|---|
| libreoffice | libreoffice | * | ≥7.0.0 – <7.0.5.1 |
| libreoffice | libreoffice | * | ≥7.1.0.0 – ≤7.1.1.1 |
References 1
- libreoffice.org https://www.libreoffice.org/about-us/security/advisories/cve-2021-25635/
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.