CVE-2026-41243

Name: CVE-2026-41243
Creator: NVD / NIST
Published: 2026-04-23T02:16:19.04+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2026-41243 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Siemvk	Openlearn	< 2026-04-14

References

https://github.com/siemvk/OpenLearn/commit/844b2a40a69d0c4911580fe501923f0b391313abPatch
https://github.com/siemvk/OpenLearn/security/advisories/GHSA-4rv3-hfh6-vqvmExploit, Vendor Advisory
https://github.com/siemvk/OpenLearn/security/advisories/GHSA-4rv3-hfh6-vqvmExploit, Vendor Advisory

Timeline

Published: Apr 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41243?

How severe is CVE-2026-41243?

CVE-2026-41243 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41243?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41243?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST