CVE-2026-8315 Stored XSS in Webbeyaz's Mediküm Web
Stored XSS in Mediküm Web allows attackers to inject scripts, potentially leading to session hijacking or malicious actions; the product is unsupported.
- 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-2026-8315?
CVE-2026-8315 is a medium-severity cross-site scripting vulnerability in Webbeyaz Web Design Mediküm Web, published on 8 Jul 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
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Webbeyaz Web Design Mediküm Web allows Stored XSS.
This issue affects Mediküm Web: through 08072026. NOTE: The vendor was contacted and it was learned that the product is not supported.
Weakness: CWE-79
Which versions are affected by CVE-2026-8315?
How do I fix CVE-2026-8315?
No fix has been published for CVE-2026-8315 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-2026-8315 being exploited?
There is no known exploitation of CVE-2026-8315 in the wild and no public exploit code.
Sources
Also known as GHSA-5wr2-9gxx-hx7w.