CVE-2025-2866— PDF signature forgery with adbe.pkcs7.sha1 SubFilter
Quick assessment
Affected
The Document Foundation LibreOffice
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
LibreOffice是The Document基金会的一套开源的办公软件套件。 LibreOffice 24.8版本至24.8.6之前版本和25.2版本至25.2.2之前版本存在安全漏洞，该漏洞源于加密签名验证不当，可能导致PDF签名欺骗。
Possible ATT&CK Techniques 1 AI
T1553.005 · Mark-of-the-Web Bypass
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I. Basic Information for CVE-2025-2866
Vulnerability Information
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Vulnerability Title
PDF signature forgery with adbe.pkcs7.sha1 SubFilter
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
LibreOffice 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreOffice是The Document基金会的一套开源的办公软件套件。 LibreOffice 24.8版本至24.8.6之前版本和25.2版本至25.2.2之前版本存在安全漏洞，该漏洞源于加密签名验证不当，可能导致PDF签名欺骗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| The Document Foundation | LibreOffice | 24.8 ~ < 24.8.6 | - |
|
II. Public POCs for CVE-2025-2866
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-2866 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2025-2866
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