CVE-2026-123529
Vikunja before 2.7.1 Stored CSS Injection via TipTap Table Cell data-background-color
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| vikunja go-vikunja code.vikunja.io/api
golang |
≥ 0; < 2.7.1 (affected, semver) 2.7.1 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.1 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 4.6 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N | CNA: VulnCheck |
| 4.0 / 5.1 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 4.6 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p23m-cq25-pc4jCNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/vikunja-before-2.7.1-stored-css-injection-via-tiptap-table-cell-data-background-colorCNA: VulnCheck · third-party-advisory
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p23m-cq25-pc4j[email protected]
- https://www.vulncheck.com/advisories/vikunja-before-2.7.1-stored-css-injection-via-tiptap-table-cell-data-background-color[email protected]
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