What is CVE-2026-10850?

CVE-2026-10850 is a medium-severity vulnerability in Plane, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-17.

How severe is CVE-2026-10850?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Plane

CVE-2026-10850

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Plane — versions 1.3.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

help@fluidattacks.com (Exploit, Third Party Advisory, third-party-advisory)
help@fluidattacks.com (Product, product)

Frequently asked questions

What is CVE-2026-10850?: CVE-2026-10850 is a medium-severity vulnerability in Plane, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-17.
How severe is CVE-2026-10850?: Medium severity. CVSS v3 base score is 5.4 out of 10.