CVE-2021-25635
Severity CVSS v4.0:
MEDIUM
Type:
CWE-295
Improper Certificate Validation
Publication date:
21/03/2025
Last modified:
10/12/2025
Description
An Improper Certificate Validation vulnerability in LibreOffice allowed <br />
an attacker to self sign an ODF document, with a signature untrusted by <br />
the target, then modify it to change the signature algorithm to an <br />
invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a <br />
valid signature issued by a trusted person<br />
<br />
<br />
This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.
Impact
Base Score 4.0
5.20
Severity 4.0
MEDIUM
Base Score 3.x
5.50
Severity 3.x
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:* | 7.0.0 (including) | 7.0.5.1 (excluding) |
| cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:* | 7.1.0.0 (including) | 7.1.1.1 (including) |
To consult the complete list of CPE names with products and versions, see this page