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Fencer Vulns
medium 6.9

CVE-2025-68933 json

Discourse non-admin moderators can exfiltrate private content via post ownership transfer

published 2026-01-28 9 mo ago modified 2026-09-08 2 mo ago also BIT-discourse-2025-68933 , EUVD-2025-206428 , GHSA-hpxv-mw7v-fqg2

cvss
6.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the `moderators_change_post_ownership` setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export their data to view the content. This is a broken access control vulnerability affecting sites that grant moderators post ownership transfer permissions. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. The patch adds visibility checks for both the topic and posts before allowing ownership transfer. As a workaround, disable the `moderators_change_post_ownership` site setting to prevent non-admin moderators from using the post ownership transfer feature.

Patch / fix

  • bitnami discourse 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0
  • discourse discourse 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami discourse
<3.5.4
>=2025.11.0, <2025.11.2
>=2025.12.0, <2025.12.1
>=2026.1.0, <2026.1.0
3.5.4
2025.11.2
2025.12.1
2026.1.0

Affected products

  • discourse discourse

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.