What is CVE-2025-55203?

CVE-2025-55203 is a medium-severity vulnerability in Makeplane Plane, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-08-15.

How severe is CVE-2025-55203?

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

Is CVE-2025-55203 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Makeplane Plane

CVE-2025-55203

Plane is open-source project management software. Prior to version 0.28.0, a stored cross-site scripting (XSS) vulnerability exists in the description_html field of Plane. This flaw allows an attacker to inject malicious JavaScript code th…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (14.5th 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

Makeplane Plane — versions < 0.28.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/makeplane/plane/security/advisories/GHSA-rwjc-xhh3-m9m9 (x_refsource_CONFIRM)
https://drive.google.com/file/d/1lQzQJ9Eun6xmcxyyAkr5ORyIrfw9ys5w/view?usp=sharing (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-55203?: CVE-2025-55203 is a medium-severity vulnerability in Makeplane Plane, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-08-15.
How severe is CVE-2025-55203?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2025-55203 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.