What is CVE-2026-8315?

CVE-2026-8315 is a medium-severity vulnerability in Webbeyaz Web Design Mediküm, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-08.

How severe is CVE-2026-8315?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Webbeyaz Web Design Mediküm

CVE-2026-8315

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-07-08 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.2th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Webbeyaz Web Design Mediküm — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0518 (government-resource)

Frequently asked questions

What is CVE-2026-8315?: CVE-2026-8315 is a medium-severity vulnerability in Webbeyaz Web Design Mediküm, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-08.
How severe is CVE-2026-8315?: Medium severity. CVSS v3 base score is 5.4 out of 10.