CVE-2021-25636 : faille élevée libreoffice libreoffice (CVSS 7.5)

LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signature is valid. An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to create a digitally signed ODF document, by manipulating the documentsignatures.xml or macrosignatures.xml stream within the document to contain both "X509Data" and "KeyValue" children of the "KeyInfo" tag, which when opened caused LibreOffice to verify using the "KeyValue" but to report verification with the unrelated "X509Data" value. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.5.

Sévérité

Élevée (CVSS 7.5)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation active

Non signalée par la CISA

Publication

24 févr. 2022

Dernière mise à jour

17 juin 2026

• libreoffice libreoffice
• fedoraproject fedora

• Fiche CVE-2021-25636 sur le NVD (NIST)
• lists.debian.org/debian-lts-announce/2023/03/msg00022.html
• lists.fedoraproject.org/archives/list/package…
• libreoffice.org/about-us/security/advisories/CVE-2021-25636/