SEPTEMBER 18, 2026
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Case File

CVE-2026-79663

MEDIUM · CVSS 4.8 EPSS 0.15% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-25 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

Ech0 versions prior to 4.7.3 are vulnerable to a stored cross-site scripting (XSS) flaw in the public RSS feed, allowing attackers with admin privileges to inject malicious tag names or raw HTML. This can lead to the execution of arbitrary JavaScript in RSS readers that render HTML summaries, potentially impacting anonymous subscribers and other users. Organizations using affected versions should prioritize patching to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-79663
Severity
MEDIUM
CVSS
4.8
EPSS
0.15%
Java

Original NVD Description

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS readers that render HTML-type summaries, affecting anonymous subscribers and other users.