CVE-2025-2866: PDF signature forgery with adbe.pkcs7.sha1 SubFilter

Published Apr 27, 2025
·
Updated

Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by Improper Validation. In the affected versions of LibreOffice a flaw in the verification code for adbe.pkcs7.sha1 signatures could cause invalid signatures to be accepted as valid This issue affects LibreOffice: from 24.8 before < 24.8.6, from 25.2 before < 25.2.2.

Affected Software

9 affected componentsFixes available
The Document Foundation LibreOffice>=24.8, <24.8.6
The Document Foundation LibreOffice>=25.2, <25.2.2
debian/libreoffice<=1:7.0.4-4+deb11u10, <=1:7.0.4-4+deb11u12, <=4:7.4.7-1+deb12u7
4:7.4.7-1+deb12u84:25.2.2-34:25.2.3-2
LibreOffice Libreoffice>=24.8.0.1<24.8.6.0
LibreOffice Libreoffice>=25.2.0.1<25.2.2
LibreOffice Libreoffice=24.8.0.0-alpha1
LibreOffice Libreoffice=24.8.0.0-beta1
LibreOffice Libreoffice=25.2.0.0-alpha1
LibreOffice Libreoffice=25.2.0.0-beta1

Event History

Apr 27, 2025
CVE Published
via MITRE·07:04 PM
Data Sourced
via MITRE·07:04 PM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·07:15 PM
Affected Software
May 12, 2025
Data Sourced
via Ubuntu·06:26 PM
RemedyDescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-2866?

CVE-2025-2866 is classified as a high-severity vulnerability due to its potential to allow PDF signature spoofing.

2

How do I fix CVE-2025-2866?

To mitigate CVE-2025-2866, users should update LibreOffice to a version that is not affected, i.e., beyond 24.8.6 or 25.2.2.

3

Which versions of LibreOffice are affected by CVE-2025-2866?

LibreOffice versions from 24.8 to 24.8.6 and 25.2 to 25.2.2 are affected by CVE-2025-2866.

4

What impact does CVE-2025-2866 have on PDF files?

CVE-2025-2866 could allow attackers to spoof PDF signatures, misleading users into trusting invalid documents.

5

Is CVE-2025-2866 related to cryptographic verification?

Yes, CVE-2025-2866 involves improper verification of cryptographic signatures, specifically for adbe.pkcs7.sha1 signatures.

Company

Resources

Contact

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CVE-2025-2866 - PDF signature forgery with adbe.pkcs7.sha1 SubFilter - SecAlerts