What is the severity of CVE-2021-25635?

CVE-2021-25635 has been classified as a high-severity vulnerability due to its potential impact on document integrity.

How do I fix CVE-2021-25635?

To fix CVE-2021-25635, you should update LibreOffice to version 7.0.6 or later, or 7.1.2 or later.

What does CVE-2021-25635 affect?

CVE-2021-25635 affects LibreOffice versions 7.0 to 7.0.5 and 7.1 to 7.1.1.

What type of vulnerability is CVE-2021-25635?

CVE-2021-25635 is an Improper Certificate Validation vulnerability that enables attackers to manipulate digital signatures.

What can an attacker do with CVE-2021-25635?

An attacker can exploit CVE-2021-25635 to create a self-signed ODF document and alter its signature algorithm, compromising document authenticity.

Vulnerability/
CVE-2021-25635

medium

5.2

CWE

295

21/3/2025

CVE-2021-25635: Content Manipulation with Certificate Validation Attack

First published: Fri Mar 21 2025(Updated: )

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.

Credit: security@documentfoundation.org

Affected Software	Affected Version	How to fix
LibreOffice Draw	>=7.0<7.0.5>=7.1<7.1.1

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Reference Links

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

Frequently Asked Questions

What is the severity of CVE-2021-25635?
CVE-2021-25635 has been classified as a high-severity vulnerability due to its potential impact on document integrity.
How do I fix CVE-2021-25635?
To fix CVE-2021-25635, you should update LibreOffice to version 7.0.6 or later, or 7.1.2 or later.
What does CVE-2021-25635 affect?
CVE-2021-25635 affects LibreOffice versions 7.0 to 7.0.5 and 7.1 to 7.1.1.
What type of vulnerability is CVE-2021-25635?
CVE-2021-25635 is an Improper Certificate Validation vulnerability that enables attackers to manipulate digital signatures.
What can an attacker do with CVE-2021-25635?
An attacker can exploit CVE-2021-25635 to create a self-signed ODF document and alter its signature algorithm, compromising document authenticity.

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collector/nvd-api
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vendor/the document foundation
canonical/libreoffice draw

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