LibreOffice up to 7.0.4/7.1.0 ODF Document certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in LibreOffice up to 7.0.4/7.1.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the component ODF Document Handler. Performing a manipulation results in certificate validation. This vulnerability is reported as CVE-2021-25635. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in LibreOffice up to 7.0.4/7.1.0. It has been classified as critical. This affects an unknown part of the component ODF Document Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed by Nds. The advisory is shared at libreoffice.org. This vulnerability is uniquely identified as CVE-2021-25635 since 01/19/2021. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

Upgrading to version 7.0.5 or 7.1.1 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: LibreOffice 7.0.5/7.1.1

Timelineinfo

01/19/2021 🔍
03/21/2025 +1522 days 🔍
03/21/2025 +0 days 🔍
12/10/2025 +264 days 🔍

Sourcesinfo

Advisory: libreoffice.org
Researcher: Nds
Status: Confirmed

CVE: CVE-2021-25635 (🔍)
GCVE (CVE): GCVE-0-2021-25635
GCVE (VulDB): GCVE-100-300597

Entryinfo

Created: 03/21/2025 16:35
Updated: 12/10/2025 21:23
Changes: 03/21/2025 16:35 (68), 12/10/2025 21:23 (10)
Complete: 🔍
Cache ID: 216::103

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