CVE-2025-66629: HedgeDoc is an open source, real-time, collaborative, markdown notes application

Q: How do I fix CVE-2025-66629?

hedgedoc: upgrade to 1.10.4. Exact commands for each OS are on this page.

Q: Is CVE-2025-66629 being exploited?

CVE-2025-66629 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-66629 affect?

CVE-2025-66629 affects hedgedoc. Severity is low (CVSS 3.7). 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, sinc

Q: How urgent is CVE-2025-66629?

Priority 13/100. No elevated risk signals yet.

Routine

LOW 3.7UPGRADE

CVE-2025-66629 is a low-severity flaw (CVSS 3.7) affecting hedgedoc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-352
Published	2025-12-05
Last modified	2026-10-15

Publisher (CNA): GitHub, Inc. · Vendor: hedgedoc

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-05 23:15 UTCPublished CVE record published
2026-10-15 21:10 UTCUpdated Record last modified

hedgedoc hedgedoc UPGRADE

Affected: < 1.10.4

Fixed in: 1.10.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hedgedoc || rpm -q hedgedoc || hedgedoc --version

2. UPGRADE to 1.10.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hedgedoc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hedgedoc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-66629?

hedgedoc: upgrade to 1.10.4. Exact commands for each OS are on this page.

Is CVE-2025-66629 being exploited?

CVE-2025-66629 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-66629 affect?

CVE-2025-66629 affects hedgedoc. Severity is low (CVSS 3.7). 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, sinc

How urgent is CVE-2025-66629?

Priority 13/100. No elevated risk signals yet.

Software pages

GitLab vulnerabilities · GitHub vulnerabilities · Dropbox vulnerabilities

Related CVEs

CVE-2026-25642 MEDIUM 4.3 UPGRADE HedgeDoc is an open source, real-time, collaborative, markdown notes application
CVE-2025-32391 MEDIUM 6.4 UPGRADE HedgeDoc is an open source, real-time, collaborative, markdown notes application
CVE-2024-45308 MEDIUM 6.5 UPGRADE HedgeDoc is an open source, real-time, collaborative, markdown notes application

References

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