CVE-2026-41243 OpenLearn's pending forum posts remain publicly readable by direct ID when moderation mode is enabled
Attackers can read unapproved forum posts via direct UUID access when moderation mode is enabled, bypassing visibility restrictions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41243?
CVE-2026-41243 is a medium-severity missing authorization vulnerability in siemvk OpenLearn, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenLearn is open-source educational forum software. Prior to commit 844b2a40a69d0c4911580fe501923f0b391313ab, when `safeMode` is enabled, unapproved forum posts are hidden from the public list, but the direct post-read procedure still returns the full post to anyone with the post UUID. Commit 844b2a40a69d0c4911580fe501923f0b391313ab fixes the issue.
Weakness: CWE-284
Which versions are affected by CVE-2026-41243?
It affects 1 product.
Products include Siemvk Openlearn.
How do I fix CVE-2026-41243?
No fix has been published for CVE-2026-41243 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-2026-41243 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41243 exists.
Sources
Also known as GHSA-4rv3-hfh6-vqvm.