Description
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.
Published: 2026-08-19
Score: 7.6 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability allows a board member to embed an entity‑encoded event‑handler payload into a card title. The title is not executed on the live board but is re‑parsed and evaluated when a user opens the card within an HTML export, enabling the attacker’s script to read and exfiltrate the full board data contained in the export file. This represents a cross‑site scripting flaw that can compromise confidentiality of board content.

Affected Systems

WeKAN version 8.72 through 10.22 are affected. The issue is fixed in version 10.23, which replaces unsafe string interpolation with DOM construction that uses textContent for untrusted values.

Risk and Exploitability

The CVSS score of 7.6 indicates a high severity of the flaw. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. Attackers who can create or modify card titles and distribute the resulting HTML export to other users can exploit the flaw. The attack vector is via a client‑side feature that parses stored markup when the HTML file is opened in a browser, so no additional network or privileged access is required.

Generated by OpenCVE AI on August 20, 2026 at 12:24 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade WeKAN to version 10.23 or later, which replaces unsafe HTML interpolation with secure DOM construction.
  • If an upgrade is not immediately possible, disable the HTML export functionality or restrict export access to trusted administrators only to prevent distribution of maliciously crafted files.
  • Alternatively, sanitize or strip entity‑encoded content from card titles prior to export, ensuring that no executable markup can be re‑parsed when the file is opened.

Generated by OpenCVE AI on August 20, 2026 at 12:24 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 19 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Wekan
Wekan wekan
Vendors & Products Wekan
Wekan wekan

Wed, 19 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 19 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Wekan: Stored XSS in HTML board exports through a card-title second parse
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N'}

Subscriptions

Wekan Wekan
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-19T19:43:28.851Z

Reserved: 2026-07-31T21:04:04.039Z

Link: CVE-2026-68900

cve-icon Vulnrichment

Updated: 2026-08-19T19:43:09.245Z

cve-icon NVD

Status : Received

Published: 2026-08-19T20:17:21.727

Modified: 2026-08-19T20:17:21.727

Link: CVE-2026-68900

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-20T12:30:05Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')