Threat intelligence

Webmention <= 5.8.0 - Unauthenticated Stored Cross-Site Scripting via MF2 'photo'/'url' Author Properties

CVE-2026-10513 · webmention

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Webmention at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Webmention <= 5.8.0 - Unauthenticated Stored Cross-Site Scripting via MF2 'photo'/'url' Author Properties
Affected software: webmention(Plugin)
Affected versions: ≤ 5.8.0
Authentication: Unauthenticated
Vulnerability type: Cross-site scripting
CVE: CVE-2026-10513
Published: 30 June 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory 5a4e144a-3c84-4da3-8fa6-e5fe9c897efe). Methodology and redistribution notes

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