CVE-2026-78834CWE-94code-injection

CVE-2026-78834

High · published September 9, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
51.2
In the wild
Unconfirmed
What it is

A code execution vulnerability exists in CMSimple 5.22 in the CoAuthors plugin. An authenticated low-privileged user who can modify page content and provide controlled imported content can trigger server-side execution by referencing crafted external or uploaded text content through the affected content import feature.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00666 · 51.2th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-09-09T00:18Z
References (2)
https://gist.github.com/AEQ3/574cb644306776a9ff1a0de30b085e62 · [email protected]https://github.com/AEQ3/CVE/issues/1 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 00:00Z
    A code execution vulnerability exists in CMSimple 5.22 in the CoAuthors plugin
    cvelistv5