CVE-2026-115507
Vikunja 2.2.0 before 2.7.1 HTML Injection via Notification Email Header
Vikunja 2.2.0 before 2.7.1 contains an HTML injection vulnerability in CreateConversationalHeader in pkg/notifications/mail.go that interpolates display names and task and project titles raw into email anchors. Authenticated users can craft titles or display names that close the anchor and inject phishing links into task-comment and task-mention notification emails sent to project members.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| vikunja go-vikunja code.vikunja.io/api
golang |
≥ 2.2.0; < 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:N/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 3.5 low |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N | CNA: VulnCheck |
Exploit evidence
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rp33-8f2m-hm6j
exploit · ADP: CISA-ADP
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rp33-8f2m-hm6jCNA: VulnCheck · vendor-advisory
- https://github.com/go-vikunja/vikunja/commit/18ff05932632c65dbc90a88118597989c6af4bf9CNA: VulnCheck · patch
- https://github.com/go-vikunja/vikunja/blob/v2.7.0/pkg/notifications/mail.go#L132-L148CNA: VulnCheck · technical-description
- https://github.com/go-vikunja/vikunja/releases/tag/v2.7.1CNA: VulnCheck · release-notes
- https://github.com/go-vikunja/vikunjaCNA: VulnCheck · product
- https://www.vulncheck.com/advisories/vikunja-2.2.0-before-2.7.1-html-injection-via-notification-email-headerCNA: VulnCheck · third-party-advisory
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rp33-8f2m-hm6jADP: CISA-ADP · exploit
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