What’s Vulnerable › Vulnerabilities

CVE-2026-41932: Vvveb < 1.0.8.3 Stored XSS via Signup Controller

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-14 · updated 2026-10-26
• Weakness: CWE-79

Description

Vvveb before 1.0.8.3 contains a stored cross-site scripting vulnerability in the customer signup flow where the Signup::addUser() controller copies raw POST username values into the display_name field before sanitization occurs. Attackers can submit HTML and script markup in the username field during signup, which gets stripped from the username column but persisted verbatim in the display_name column, allowing stored XSS execution when display_name is rendered without encoding in vulnerable views.

Affected products

• givanz Vvveb: before 1.0.8.3 — fixed in 1.0.8.3

How to fix

Upgrade to a fixed version: givanz Vvveb 1.0.8.3. Check the vendor advisory for mitigations.

References

• https://github.com/givanz/Vvveb/commit/fefac290a8c85d3c87fe80ffed68b6c5bc50e93c
• https://github.com/givanz/Vvveb/releases/tag/1.0.8.3
• https://www.vulncheck.com/advisories/vvveb-stored-xss-via-signup-controller

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