What is CVE-2025-21616?

CVE-2025-21616 is a medium-severity vulnerability in Makeplane Plane, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-01-06.

How severe is CVE-2025-21616?

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

XSS in Makeplane Plane

CVE-2025-21616

Plane is an open-source project management tool. A cross-site scripting (XSS) vulnerability has been identified in Plane versions prior to 0.23. The vulnerability allows authenticated users to upload SVG files containing malicious JavaScript code as profile images, which gets executed in victims' browsers when viewing the profile image.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-01-06 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.003 (17.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Makeplane Plane — versions < 0.23
Plane

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/makeplane/plane/security/advisories/GHSA-rcg8-g69v-x23j (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21616?: CVE-2025-21616 is a medium-severity vulnerability in Makeplane Plane, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-01-06.
How severe is CVE-2025-21616?: Medium severity. CVSS v3 base score is 5.4 out of 10.