What is CVE-2025-66629?

CVE-2025-66629 is a low-severity vulnerability in Hedgedoc, classified under Cross-Site Request Forgery (CSRF). CVSS score: 3.7/10. Published 2025-12-05.

How severe is CVE-2025-66629?

Low severity. CVSS v3 base score is 3.7 out of 10.

CSRF in Hedgedoc

CVE-2025-66629

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.4, some of HedgeDoc's OAuth2 endpoints for social login providers such as Google, GitHub, GitLab, Facebook or Dropbox lack CSRF protection, since they don't send a state parameter and verify the response using this parameter. This vulnerability is fixed in 1.10.4.

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.001 (0.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

Hedgedoc — versions < 1.10.4

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-66629?: CVE-2025-66629 is a low-severity vulnerability in Hedgedoc, classified under Cross-Site Request Forgery (CSRF). CVSS score: 3.7/10. Published 2025-12-05.
How severe is CVE-2025-66629?: Low severity. CVSS v3 base score is 3.7 out of 10.