Answer in brief
CVE-2026-77991 records a Unknown severity vulnerability in Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1. The current sources do not mark it as known exploited. The current feed maps joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomla (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomla (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomlageneric | 1.0.0-5.0.0 | Not reported |
Published upstream
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 27, 2026
Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1 - The administrator source model allows to write dangerous file type incl. PHP, leading to remote code execution.
Quoted source text, attributed separately from HOL analysis.