EUVD-2026-31849Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
3DescriptionGitHub Advisory
e107 is a content management system (CMS). Prior to 2.3.4, a Broken Access Control vulnerability exists in the application, allowing an unauthorized authenticated user to edit comments posted by others. This stems from inadequate server-side access control validation, where the application depends only on a predictable identifier in the request to determine which comment to edit, without confirming the requesting user’s ownership of the comment. This vulnerability is fixed in 2.3.4.
AnalysisAI
Broken access control in e107 CMS prior to version 2.3.4 permits any low-privileged authenticated user to overwrite comments authored by other users, including administrators. The server-side updateComment() function in comment_class.php accepted a comment_id from the request and issued an UPDATE SQL query filtered only by that identifier, never verifying that the requesting user owned the targeted comment. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated user session on the target e107 instance (PR:L per CVSS vector) - unauthenticated access is not sufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N yields a score of 6.5 (Medium). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers a standard user account on a public e107 community site, then iterates through sequential comment_id values in the comment edit endpoint, submitting crafted POST requests targeting comments authored by other users or administrators. Because the server performs no ownership validation before version 2.3.4, the attacker's content replaces the original comment without error. … |
| Remediation | Upgrade e107 to version 2.3.4 or later, which applies the server-side ownership check introduced in commit 23961a8f (https://github.com/e107inc/e107/commit/23961a8f). … Detailed patch versions, workarounds, and compensating controls in full report. |
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