How severe is CVE-2026-41243?

CVE-2026-41243 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-41243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41243?

CVE-2026-41243 affects Siemvk Openlearn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41243 have an EU (EUVD) identifier?

Yes. CVE-2026-41243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25164.

When was CVE-2026-41243 published?

CVE-2026-41243 was published on 2026-04-23 and last updated on 2026-06-17.

CVE-2026-41243

CVE-2026-41243 is a medium-severity vulnerability in Siemvk Openlearn with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 6.9
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25164
Weakness: CWE-284
Affected product: Siemvk Openlearn
Published: 2026-04-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-41243?: 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.
How severe is CVE-2026-41243?: CVE-2026-41243 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-41243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41243?: CVE-2026-41243 affects Siemvk Openlearn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41243 have an EU (EUVD) identifier?: Yes. CVE-2026-41243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25164.
When was CVE-2026-41243 published?: CVE-2026-41243 was published on 2026-04-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:siemvk:openlearn:*:*:*:*:*:*:*:*

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