CVE-2025-59337: Discourse is an open-source community discussion platform

Q: How do I fix CVE-2025-59337?

discourse: upgrade to 3.5.1, 3.6.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-59337 being exploited?

CVE-2025-59337 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-2025-59337 affect?

CVE-2025-59337 affects discourse. Severity is medium (CVSS 6.8). Discourse is an open-source community discussion platform. In versions 3.5.0 and below, malicious meta-commands could be embedded in a backup dump and executed during restore. In multisite setups, this allowed an admin of one site to access

Q: How urgent is CVE-2025-59337?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 6.8UPGRADE

CVE-2025-59337 is a medium-severity flaw (CVSS 6.8) affecting discourse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Discourse is an open-source community discussion platform. In versions 3.5.0 and below, malicious meta-commands could be embedded in a backup dump and executed during restore. In multisite setups, this allowed an admin of one site to access data or credentials from other sites. This issue is fixed in version 3.5.1.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-77
Published	2025-10-01
Last modified	2026-10-19

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

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-01 21:16 UTCPublished CVE record published
2026-10-19 17:10 UTCUpdated Record last modified

discourse discourse UPGRADE

Affected: < 3.5.1 · < 3.6.0 · 3.6.0 beta1

Fixed in: 3.5.1, 3.6.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.5.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade discourse

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-2025-59337?

discourse: upgrade to 3.5.1, 3.6.0. Exact commands for each OS are on this page.

Is CVE-2025-59337 being exploited?

CVE-2025-59337 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-2025-59337 affect?

CVE-2025-59337 affects discourse. Severity is medium (CVSS 6.8). Discourse is an open-source community discussion platform. In versions 3.5.0 and below, malicious meta-commands could be embedded in a backup dump and executed during restore. In multisite setups, this allowed an admin of one site to access

How urgent is CVE-2025-59337?

Priority 29/100. No elevated risk signals yet.

Related CVEs

CVE-2025-58055 MEDIUM 4.3 UPGRADE Discourse is an open-source community discussion platform
CVE-2025-58054 LOW 3.5 UPGRADE Discourse is an open-source community discussion platform
CVE-2025-61598 MEDIUM 5.3 UPGRADE Discourse is an open source discussion platform
CVE-2026-27481 MEDIUM 5.3 UPGRADE Discourse is an open-source discussion platform
CVE-2026-34947 MEDIUM 5.3 UPGRADE Discourse is an open-source discussion platform

References

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