Wekan: Stored XSS in HTML board exports through a card-title second parse
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Wekan is open source kanban built with Meteor. From 8.72 until 10.23, addBoardHTMLToZip() in client/lib/exportHTML.js read a card title and body through textContent, which decoded entity-encoded markup, and then interpolated titleText and allText into content.innerHTML in the exported index.html. A board member could store an entity-encoded event-handler payload in a card title that remained inert on the live board but was reparsed and executed when a recipient clicked the card in the downloaded HTML export, allowing the script to read and transmit all board data contained in that export, including content added after the attacker's membership was removed. Version 10.23 builds the modal with DOM nodes and assigns untrusted values through textContent. This issue is fixed in version 10.23.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA wekan (wekan) Fixed in 10.23
Timeline
- 2026-10-02 Threatist record created from CVE-2026-68900
References
More wekan vulnerabilities
- TI-2026-40177 Improper authentication in wekan CVSS 3.1CRITICAL 9.8
- TI-2026-37989 Wekan: OIDC Account Takeover via Unconditional Email-Based Account Merge in onCreateUser hook CVSS 4.0CRITICAL 9.2
- TI-2026-48308 Improper privilege management in wekan CVSS 3.1HIGH 8.8
- TI-2026-48305 Wekan: SSRF filter bypass via DNS-resolving hostname in outgoing webhooks (incomplete fix of CVE-2026-53446) CVSS 3.1HIGH 8.5
- TI-2026-39911 Improper access control in wekan CVSS 3.1HIGH 8.5
- TI-2026-01855 WeKan Activity Publication activities.js LinkedBoardActivitiesBleed information disclosure CVSS 4.0MEDIUM 6.9
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences