CVE-2026-79663: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in lin-snow Ech0
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.
CVE-2026-79663: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in lin-snow Ech0
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.
CVSS v4.0
Score 4.8medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-25T11:09:11.171Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8d820cacd9273b4922540c
Added to database: 08/25/2026, 11:52:44 UTC
Last updated: 08/26/2026, 01:08:44 UTC
Views: 7
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