CVE-2026-41243: CWE-284: Improper Access Control in siemvk OpenLearn
CVE-2026-41243 is an improper access control vulnerability in siemvk's OpenLearn forum software. Before a specific commit, when safeMode was enabled, unapproved posts were hidden from public listings but could still be accessed directly via their UUID. This allowed unauthorized users to read posts that should have been restricted. The issue was fixed in commit 844b2a40a69d0c4911580fe501923f0b391313ab. The vulnerability has a medium severity with a CVSS score of 6. 9.
AI Analysis
Technical Summary
OpenLearn, an open-source educational forum software by siemvk, had an access control flaw (CWE-284) prior to commit 844b2a40a69d0c4911580fe501923f0b391313ab. When safeMode was enabled, unapproved forum posts were hidden from public lists but could still be retrieved directly by anyone possessing the post's UUID. This allowed unauthorized read access to restricted content. The commit mentioned addresses this by enforcing proper access control on direct post reads.
Potential Impact
Unauthorized users could access unapproved forum posts by directly requesting them via their UUID, bypassing the intended visibility restrictions when safeMode was enabled. This could lead to exposure of sensitive or unapproved content to the public. There are no known exploits in the wild.
Mitigation Recommendations
A fix is available in commit 844b2a40a69d0c4911580fe501923f0b391313ab. Users of OpenLearn should update to this commit or a later version to remediate the vulnerability. Patch status is not explicitly confirmed beyond this commit reference; users should verify with the vendor or project repository for official patch releases.
CVE-2026-41243: CWE-284: Improper Access Control in siemvk OpenLearn
Description
CVE-2026-41243 is an improper access control vulnerability in siemvk's OpenLearn forum software. Before a specific commit, when safeMode was enabled, unapproved posts were hidden from public listings but could still be accessed directly via their UUID. This allowed unauthorized users to read posts that should have been restricted. The issue was fixed in commit 844b2a40a69d0c4911580fe501923f0b391313ab. The vulnerability has a medium severity with a CVSS score of 6. 9.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenLearn, an open-source educational forum software by siemvk, had an access control flaw (CWE-284) prior to commit 844b2a40a69d0c4911580fe501923f0b391313ab. When safeMode was enabled, unapproved forum posts were hidden from public lists but could still be retrieved directly by anyone possessing the post's UUID. This allowed unauthorized read access to restricted content. The commit mentioned addresses this by enforcing proper access control on direct post reads.
Potential Impact
Unauthorized users could access unapproved forum posts by directly requesting them via their UUID, bypassing the intended visibility restrictions when safeMode was enabled. This could lead to exposure of sensitive or unapproved content to the public. There are no known exploits in the wild.
Mitigation Recommendations
A fix is available in commit 844b2a40a69d0c4911580fe501923f0b391313ab. Users of OpenLearn should update to this commit or a later version to remediate the vulnerability. Patch status is not explicitly confirmed beyond this commit reference; users should verify with the vendor or project repository for official patch releases.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-18T03:47:03.135Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e9707c87115cfb6852214a
Added to database: 4/23/2026, 1:06:04 AM
Last enriched: 4/23/2026, 1:22:15 AM
Last updated: 4/23/2026, 3:24:40 AM
Views: 8
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.