Vulnerability-Lookup

CVE-2025-40934 (GCVE-0-2025-40934)

Vulnerability from cvelistv5 – Published: 2025-11-26 22:34 – Updated: 2025-11-28 18:54

Title

XML-Sig prior to 0.68 for Perl improperly validates XML without signatures

Summary

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.

Severity

9.3 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-11-28 18:50 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 62/100 over 369 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/perl-net-saml2/perl-XML-Sig/is…	issue-tracking
https://github.com/perl-net-saml2/perl-XML-Sig/pull/64	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
TIMLEGGE	XML::Sig	Affected: 0.27 , < 0.68 (custom)	guessed

Credits

gttds

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-40934

Vulnerability from fkie_nvd - Published: 2025-11-26 23:15 - Updated: 2026-10-18 20:10

Severity

9.3 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/perl-net-saml2/perl-XML-Sig/issues/63	Issue Tracking, Patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/perl-net-saml2/perl-XML-Sig/pull/64	Issue Tracking

Impacted products

	Vendor	Product	Version
	xml\	\	sig_project

JSON

To clipboard

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      "type": "Secondary"
    }
  ]
}

GHSA-V825-MC9M-64QR

Vulnerability from github – Published: 2025-11-27 00:30 – Updated: 2025-11-28 21:31

Details

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.

Severity

9.3 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40934"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-26T23:15:47Z",
    "severity": "CRITICAL"
  },
  "details": "XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted.\n\nAn attacker can remove the signature from the XML document to make it pass the verification check.\n\nXML-Sig is a Perl module to validate signatures on XML files.\u00a0 An unsigned XML file should return an error message.\u00a0 The affected versions return true when attempting to validate an XML file that contains no signatures.",
  "id": "GHSA-v825-mc9m-64qr",
  "modified": "2025-11-28T21:31:18Z",
  "published": "2025-11-27T00:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40934"
    },
    {
      "type": "WEB",
      "url": "https://github.com/perl-net-saml2/perl-XML-Sig/issues/63"
    },
    {
      "type": "WEB",
      "url": "https://github.com/perl-net-saml2/perl-XML-Sig/pull/64"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2025-40934 (GCVE-0-2025-40934)

FKIE_CVE-2025-40934

GHSA-V825-MC9M-64QR

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