CVE-2026-41243Public exploitNetwork attack vector

Unauthenticated pending-post disclosure via unchecked direct read

Published Apr 23, 2026 · Updated Apr 23, 2026

Improper access control in LibreLearn OpenLearn 0.1.0 and earlier allows remote attackers to read pending forum posts by UUID. The public getSpecificPost procedure queries only the attacker-supplied postId and returns the full post, author data, and votes without applying the hasBeenAdminChecked filter used by getPosts. Exploitation requires safeMode to be enabled and the post UUID to be known; unauthenticated callers can expose unreviewed content before moderator approval.

CVSS severity6.9
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in LibreLearn OpenLearn 0.1.0 and earlier allows remote attackers to read pending forum posts by UUID. The public getSpecificPost procedure queries only the attacker-supplied postId and returns the full post, author data, and votes without applying the hasBeenAdminChecked filter used by getPosts. Exploitation requires safeMode to be enabled and the post UUID to be known; unauthenticated callers can expose unreviewed content before moderator approval.

The record

CVE
CVE-2026-41243
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
LibreLearn
Product
OpenLearn
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 844b2a40a69d0c4911580fe501923f0b391313ab

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LibreLearn · OpenLearnversion=< 844b2a40a69d0c4911580fe501923f0b391313ab

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
6.9GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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