CVE-2026-33398 Authenticated users can read hidden forum posts through `/forum/get_quotes`
Authenticated users can read hidden forum posts by bypassing ACL checks in the get_quotes endpoint, exposing private content.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33398?
CVE-2026-33398 is a high-severity missing authorization vulnerability in NamelessMC Nameless, published on 2 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
NamelessMC is website software for Minecraft servers. In version 2.2.4, `modules/Forum/pages/forum/get_quotes.php` only checks whether the caller is logged in, then reads a post by attacker-controlled `post` ID and returns its content. The backend helper in `modules/Forum/classes/Forum.php` does not enforce forum or topic ACLs. In contrast, the normal topic page in `modules/Forum/pages/forum/view_topic.php` enforces forum visibility and `view_other_topics`. Any low-privileged authenticated user can enumerate post IDs and read content from hidden, private, or staff-only forums. Version 2.2.5 fixes the issue.
Weakness: CWE-285
Which versions are affected by CVE-2026-33398?
How do I fix CVE-2026-33398?
No fix has been published for CVE-2026-33398 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33398 being exploited?
There is no known exploitation of CVE-2026-33398 in the wild and no public exploit code.
Sources
Also known as GHSA-2r6x-cv4f-h8fx.