EUVD-2026-42225
GHSA-5wr2-9gxx-hx7w
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Low-privilege auth is required to store the payload (PR:L), victim must view the page (UI:R), and script executes cross-boundary in victim browser (S:C); no availability impact applies.
Primary rating from Vendor (TR-CERT).
CVSS VectorVendor: TR-CERT
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionCVE.org
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.
AnalysisAI
Stored cross-site scripting in Mediküm Web (by Webbeyaz Web Design) enables authenticated low-privilege attackers to persist malicious scripts that execute in the browsers of other users who view the affected pages. All versions through 08072026 are affected per the CVE scope, with the CVSS scope-change metric (S:C) confirming cross-boundary execution into victim browser sessions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to possess a valid low-privilege authenticated account on the Mediküm Web instance (PR:L in the CVSS vector confirms this). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 5.4 (Medium) reflects meaningful but constrained risk: PR:L requires the attacker to hold a valid low-privilege account before injection is possible, and UI:R means a victim must actively visit the page hosting the stored payload - reducing opportunistic mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a low-privilege account submits a crafted input (e.g., a form field or profile attribute) containing a JavaScript payload such as a cookie-stealing script; this payload is stored server-side without sanitization. When an administrator or another authenticated user subsequently loads the affected page, the stored script executes in their browser under the application's origin, potentially harvesting their session token and forwarding it to an attacker-controlled endpoint. … |
| Remediation | No vendor-released patch exists and none will be forthcoming, as the vendor has confirmed the product is unsupported. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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