CVE Explorer

CVE-2026-10513

The Webmention plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 5.8.0 via parser-derived 'avatar' and 'url' author metadata. This is due to insufficient input sanitization and output escaping on user-supplied MF2 author properties processed by the unauthenticated webmention REST endpoint and rendered directly into HTML 'value' attributes by the edit-comment-form template without esc_attr() or esc_url(). This makes it possible for unauthenticated a

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f0e24f31b1a1f03da9a690686690f35e3271b90e8f003fa99a2fcc18cb60dedc

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Webmention","vendor":"pfefferle","versions":[{"lessThanOrEqual":"5.8.0","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":7.2,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"url":"https://plugins.trac.wordpress.org/browser/webmention/tags/5.7.0/includes/handler/class-mf2.php#L129"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /containers/cna/references/2

{"url":"https://plugins.trac.wordpress.org/browser/webmention/tags/5.7.0/templates/edit-comment-form.php#L15"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /containers/cna/references/1

{"url":"https://plugins.trac.wordpress.org/changeset/3583033/webmention"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /containers/cna/references/3

{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/5a4e144a-3c84-4da3-8fa6-e5fe9c897efe?source=cve"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:7ab34b09a065e88330110e6bba30436eb71b1ff493fa112bdb4af5c08b63115f · sha256:71a25c23f48b9aac… · /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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