CVE-2026-78834: n/a
Description
CVE-2026-78834 is a high-severity code execution vulnerability in CMSimple 5.22 affecting the CoAuthors plugin. It allows an authenticated low-privileged user with permission to modify page content to trigger server-side code execution by importing crafted external or uploaded text content through the content import feature.
CVSS v3.1
Score 8.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in CMSimple version 5.22 within the CoAuthors plugin. An authenticated user with low privileges who can modify page content can exploit the content import functionality by referencing specially crafted external or uploaded text content. This leads to server-side code execution, posing a critical risk to confidentiality, integrity, and availability of the affected system. The CVSS v3.1 base score is 8.8, reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an authenticated low-privileged user to execute arbitrary code on the server, potentially leading to full system compromise, data theft, or service disruption.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the content import feature to trusted users only and monitor for suspicious activity related to content imports.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-08-25T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6aa06e9eacd9273b492e1809
Added to database: 09/08/2026, 20:22:54 UTC
Last enriched: 09/16/2026, 02:43:43 UTC
Last updated: 10/23/2026, 01:15:27 UTC
Views: 82
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