Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck

CVE-2026-63171Omnispace Agora Project < 26.10.0 Stored XSS via Category Description

Medium 5.4

In plain English

A medium-severity cross-site scripting in Agora Project from Omnispace. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 87.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Omnispace Agora Project before 26.10.0 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious script by submitting a crafted forum category description containing a double-quote character that breaks out of an HTML input value attribute. Attackers can exploit the HTMLPurifier configuration that preserves double-quotes to escape the attribute context and execute arbitrary script in the browser of users viewing the forum category.

Affected products (as reported)

Vendor	Product	Versions
Omnispace	Agora Project	0 – before 26.10.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

Fixed Release Tag release-notes, patch
Project Webpage product
VulnCheck Advisory: Omnispace Agora Project < 26.10.0 Stored XSS via Category Description third-party-advisory