{"id":"CVE-2026-123529","published":"2026-11-08T02:16:42.830","lastModified":"2026-11-10T18:17:24.693","description":"Vikunja before 2.7.1 contains a stored CSS injection vulnerability that allows authenticated users with project write access to inject arbitrary CSS via unsanitized table-cell data-background-color attributes. Attackers can store crafted task descriptions or comments to render full-viewport phishing overlays or force zero-click outbound background-image requests that deanonymize viewers.","cvssScore":4.6,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","cwes":["CWE-1021"],"vendors":[],"products":[],"references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p23m-cq25-pc4j","tags":[]},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-stored-css-injection-via-tiptap-table-cell-data-background-color","tags":[]}],"exploitRefs":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p23m-cq25-pc4j","tags":[]}],"hasPoc":true,"ai":null}