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CVE-2025-66578

xmlseclibs is a library written in PHP for working with XML Encryption and Signatures. Versions 3.1.3 contain an authentication bypass vulnerability due to a flaw in the libxml2 canonicalization process during document transformation. When libxml2’s canonicalization is invoked on an invalid XML input, it may return an empty string rather than a canonicalized node. xmlseclibs then proceeds to compute the DigestValue over this empty string, treating it as if canonicalization succeeded. This issue
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b613efe0d8f7a4a2f995c0897263b7cdc40d26ef8d1c8e94c6c522d669587623
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"xmlseclibs","vendor":"robrichards","versions":[{"status":"affected","version":"< 3.1.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:403eff91ec50e1c46874b30f2717a8af2f0f06f866342d3b847020abb9c6d83a · sha256:3ef4127f94960cd8… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:403eff91ec50e1c46874b30f2717a8af2f0f06f866342d3b847020abb9c6d83a · sha256:3ef4127f94960cd8… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:403eff91ec50e1c46874b30f2717a8af2f0f06f866342d3b847020abb9c6d83a · sha256:3ef4127f94960cd8… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/robrichards/xmlseclibs/blob/f4131320c6dcd460f1b0c67f16f8bf24ce4b5c3e/src/XMLSecurityDSig.php#L296","tags":["x_refsource_MISC"],"url":"https://github.com/robrichards/xmlseclibs/blob/f4131320c6dcd460f1b0c67f16f8bf24ce4b5c3e/src/XMLSecurityDSig.php#L296"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:403eff91ec50e1c46874b30f2717a8af2f0f06f866342d3b847020abb9c6d83a · sha256:3ef4127f94960cd8… · /containers/cna/references/2
{"name":"https://github.com/robrichards/xmlseclibs/commit/69fd63080bc47a8d51bc101c30b7cb756862d1d6","tags":["x_refsource_MISC"],"url":"https://github.com/robrichards/xmlseclibs/commit/69fd63080bc47a8d51bc101c30b7cb756862d1d6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:403eff91ec50e1c46874b30f2717a8af2f0f06f866342d3b847020abb9c6d83a · sha256:3ef4127f94960cd8… · /containers/cna/references/1
{"name":"https://github.com/robrichards/xmlseclibs/security/advisories/GHSA-c4cc-x928-vjw9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/robrichards/xmlseclibs/security/advisories/GHSA-c4cc-x928-vjw9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:403eff91ec50e1c46874b30f2717a8af2f0f06f866342d3b847020abb9c6d83a · sha256:3ef4127f94960cd8… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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