CVE-2026-55247: plone.app.event vulnerable to denial of service via iCalendar import
By abusing the iCalendar import functionality, a logged-in editor could take the whole site offline, make the server reach into the internal network and read calendar files off disk (SSRF), and store XSS.
References
- github.com/advisories/GHSA-r82h-mqw3-fc56
- github.com/plone/plone.app.event/commit/1e3c83c15a24d1a789cdb012593505bc5620e28e
- github.com/plone/plone.app.event/commit/4de5eb3ea9e4f7f1781622e6d64fc086629d1437
- github.com/plone/plone.app.event/releases/tag/5.2.4
- github.com/plone/plone.app.event/releases/tag/6.0.1
- github.com/plone/plone.app.event/security/advisories/GHSA-r82h-mqw3-fc56
- nvd.nist.gov/vuln/detail/CVE-2026-55247
Code Behaviors & Features
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