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CVE-2025-40934— XML-Sig prior to 0.68 for Perl improperly validates XML without signatures

Quick assessment

Affected
TIMLEGGE XML::Sig
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.

perl-XML-Sig是Net::SAML2 Perl Support开源的一个对XML数字签名进行签名和验证的包。 perl-XML-Sig 0.27版本至0.67版本存在安全漏洞，该漏洞源于错误验证无签名的XML文件。

AI Predicted 7.5 Difficulty: Easy EPSS 0.17% · P5
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I. Basic Information for CVE-2025-40934

Vulnerability Information
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Vulnerability Title
XML-Sig prior to 0.68 for Perl improperly validates XML without signatures
Source: CVE Program / CVE List V5
Vulnerability Description
XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted. An attacker can remove the signature from the XML document to make it pass the verification check. XML-Sig is a Perl module to validate signatures on XML files.  An unsigned XML file should return an error message.  The affected versions return true when attempting to validate an XML file that contains no signatures.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
perl-XML-Sig 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
perl-XML-Sig是Net::SAML2 Perl Support开源的一个对XML数字签名进行签名和验证的包。 perl-XML-Sig 0.27版本至0.67版本存在安全漏洞，该漏洞源于错误验证无签名的XML文件。
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
TIMLEGGE XML::Sig 0.27 ~ 0.68 -

II. Public POCs for CVE-2025-40934

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III. Intelligence Information for CVE-2025-40934

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IV. Related Vulnerabilities

Same product: XML::Sig
Same vendor: TIMLEGGE
Same weakness: CWE-347

V. Comments for CVE-2025-40934

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