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CVE-2021-25635

Content Manipulation with Certificate Validation Attack

Published: Mar 21, 2025Updated: Dec 10, 2025 Sources: CVE List NVD BDUCWE-295
5.5MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 96.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:HA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-295

Affected Products

libreofficelibreoffice
On-premDesktop App
Consumer Software / productivity
LibreOfficeThe Document Foundation
On-premDesktop App
Consumer Software / productivity
libreofficeoss-projectFIConsumer Software
the document foundationoss-projectNLConsumer Softwareaka document foundation, tdf

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://www.libreoffice.org/about-us/security/advisories/cve-2021-25635/
libreoffice.org
http://www.libreoffice.org/about-us/security/advisories/cve-2021-25635/
libreoffice.org

Timeline

Published
Mar 21, 2025
Last Updated
Dec 10, 2025

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