CVE-2026-10850 Plane 1.3.1 - Stored XSS in intake issue description_html
A low-privileged user can inject malicious scripts into intake work item descriptions, potentially compromising other users' sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-10850?
CVE-2026-10850 is a medium-severity cross-site scripting vulnerability in Plane, published on 17 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Plane CE 1.3.1 allows a low-privileged project member to submit arbitrary HTML/JS in the description_html field when creating an intake work item through the API v1 intake endpoint.
Weakness: CWE-79
Which versions are affected by CVE-2026-10850?
It affects 1 product.
Products include Plane Plane.
How do I fix CVE-2026-10850?
No fix has been published for CVE-2026-10850 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-10850 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10850 exists.
Other vulnerabilities in Plane
- CVE-2024-47830 Plane allows server side request forgery via /_next/image endpoint
- CVE-2026-30242 Plane: SSRF via Incomplete IP Validation in Webhook URL Serializer
- CVE-2026-46558 Missing authorization in plane
- CVE-2026-39843 Plane has a Server-Side Request Forgery (SSRF) in Favicon Fetching
- CVE-2026-27706 Plane Vulnerable to Full Read SSRF via Favicon Fetching in "Add Link" Feature
Sources
Also known as GHSA-4fp8-7gvj-j2xg.