CVE-2021-25633
libreoffice: Content Manipulation with Double Certificate Attack
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Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 11, 2021
Updated · November 22, 2025
Description
LibreOffice improperly validated signatures which by manipulation of signatures xml files allowed for multiple certificate data to be combined and led to the ability to show content as validly signed even if it was not content related to the signature
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.1CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE-295 · Improper Certificate Validation