What’s Vulnerable › Vulnerabilities

CVE-2026-41243: OpenLearn's pending forum posts remain publicly readable by direct ID when moderation mode is enabled

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-23 · updated 2026-10-26
• Weakness: CWE-284

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.

Affected products

• siemvk OpenLearn: before 2026-04-14 — fixed in 2026-04-14

How to fix

Upgrade to a fixed version: siemvk OpenLearn 2026-04-14. Check the vendor advisory for mitigations.

References

• https://github.com/siemvk/OpenLearn/commit/844b2a40a69d0c4911580fe501923f0b391313ab
• https://github.com/siemvk/OpenLearn/security/advisories/GHSA-4rv3-hfh6-vqvm
• https://github.com/siemvk/OpenLearn/security/advisories/GHSA-4rv3-hfh6-vqvm

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