CVE-2026-68900: Wekan: Stored XSS in HTML board exports through a card-title second parse
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.
Security readout for executives and security teams
Plain-English summary
A board member can plant hidden script-like content in a card title. It stays harmless in Wekan but may run when someone opens an exported HTML board and clicks that card. The script could expose all data packaged in the export, including content added after the attacker lost membership.
Executive priority
Prioritize prompt upgrading where sensitive boards are exported to HTML or external members can create cards. The vulnerability needs user interaction, but a successful attack can disclose the complete exported board and persist beyond the attacker’s membership. Treat existing exports from affected versions as potentially unsafe.
Technical view
Wekan 8.72 through 10.22 decodes entity-encoded card content through textContent, then inserts the resulting title and body into innerHTML. This second parse creates stored cross-site scripting in exported index.html. Exploitation requires board access and recipient interaction. Version 10.23 uses DOM nodes and textContent for untrusted values.
Likely exposure
Exposure is limited to Wekan versions 8.72 through 10.22 where boards are exported as HTML. Risk is highest when untrusted or former members could create cards and recipients retain, share, or open those exports. Live boards are not identified as the execution point.
Exploitation context
The supplied sources do not report active exploitation, and this CVE is not listed as KEV in the bundle. A board member must first store crafted content, then a recipient must download the HTML export and click the affected card. Successful execution could disclose exported board data.
Researcher notes
This is a stored XSS caused by an entity-decoding and HTML-reparsing boundary in the export path. The scope change and high confidentiality impact support CVSS 3.1 score 7.6. Evidence identifies the exported card modal as the sink; it does not establish execution on the live board or exploitation in the wild.
Mitigation direction
Upgrade Wekan to version 10.23 or later.
Avoid opening or sharing HTML board exports produced by affected versions until reviewed.
Restrict board membership and HTML export access while upgrades are pending.
Follow Wekan advisory guidance for any additional remediation updates.
Validation and detection
Inventory Wekan instances and confirm whether versions 8.72 through 10.22 are deployed.
Verify upgraded instances report version 10.23 or later.
Identify HTML board exports generated by affected versions and assess their distribution.
Confirm the export implementation assigns untrusted card values through textContent, not innerHTML.
Review board membership history for untrusted users who could create card content.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
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CWE-79: User-session and phishing behavior lookup
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