XSS in Givanz Vvveb
CVE-2026-41929
Vvveb before 1.0.8.2 contains an unauthenticated reflected cross-site scripting vulnerability in the visual editor preview renderer that allows attackers to execute arbitrary JavaScript by manipulating the r query parameter and _component_ajax POST parameter. Attackers can craft a malicious link or auto-submitted form that causes victims to execute attacker-controlled JavaScript in the context of the Vvveb origin, as the gating function isEditor() performs no session, role, or token verification and the view handler injects raw HTML POST body content without sanitization.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.7% 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: 0.003 · change: +0.001
Affected products
- Givanz Vvveb — versions 0
Weakness classification (CWE)
References
- github.com/givanz/Vvveb/releases/tag/1.0.8.2 (release-notes)
- github.com/givanz/Vvveb/security/advisories/GHSA-wwmv-4g9g-p48g (vendor-advisory)
- github.com/givanz/Vvveb/commit/54a9e846fb94192f1b31ae81d81d25c874662e6a (patch)
- www.vulncheck.com/advisories/vvveb-unauthenticated-reflected-xss-via-visual-edi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-41929?
- CVE-2026-41929 is a medium-severity vulnerability in Givanz Vvveb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-07.
- How severe is CVE-2026-41929?
- Medium severity. CVSS v3 base score is 6.1 out of 10.