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CVE-2025-6491

In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (>2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d2ca46c9787556666029208f9eb0d8664fdf5c6253b1b4e05dff6db5cf17a796
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageName":"soap","product":"PHP","vendor":"PHP Group","versions":[{"lessThan":"8.1.33","status":"affected","version":"8.1.*","versionType":"semver"},{"lessThan":"8.2.29","status":"affected","version":"8.2.*","versionType":"semver"},{"lessThan":"8.3.23","status":"affected","version":"8.3.*","versionType":"semver"},{"lessThan":"8.4.10","status":"affected","version":"8.4.*","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2025/07/11/4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/adp/1/references/1
{"url":"https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/adp/0/references/0
{"url":"https://lists.debian.org/debian-lts-announce/2025/07/msg00017.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a67de83654a0b98f82467c6aa1a9c31544dad557e4a33f54dabbc776824b1571 · sha256:54aa6d80c3a2b576… · /containers/adp/1/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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