CVE-2026-104479 Shopclass before 6.2.0 Stored XSS via Listing Description Field
Attackers can inject malicious scripts into listing descriptions, executing code in the site origin for visitors when TinyMCE is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-104479?
CVE-2026-104479 is a medium-severity cross-site scripting vulnerability in mindstellar shopclass, published on 2 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Shopclass before 6.2.0 contains a stored cross-site scripting vulnerability that allows self-registered non-admin users to inject scripts into item listing descriptions when frontend TinyMCE is enabled. Attackers can submit malicious JavaScript, which ItemActions.php saves without tag stripping, causing it to execute in the site origin for any visitor viewing the listing.
Weakness: CWE-79
Which versions are affected by CVE-2026-104479?
How do I fix CVE-2026-104479?
No fix has been published for CVE-2026-104479 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-104479 being exploited?
There is no known exploitation of CVE-2026-104479 in the wild and no public exploit code.
Sources
Also known as GHSA-3gwr-hcgg-p3rv.