Event Handler Injection Vulnerability in Vvveb CMS
CVE-2026-55230

8.7HIGH

Key Information:

Vendor

Givanz

Status
Vvveb
Vendor
CVE Published:
1 October 2026

What is CVE-2026-55230?

Vvveb CMS, a user-friendly content management system, has a vulnerability resulting from inadequate HTML sanitization in versions before 1.0.8.6. Specifically, the system fails to properly strip event-handler attributes when a tag includes a greater-than character in a quoted attribute value. This flaw allows low-privilege content authors, such as those with author or contributor roles, to inject malicious JavaScript payloads into posts or product content. When this content is viewed by site visitors, including administrators, the injected script executes in their browsers, potentially leading to unauthorized access and account takeover. Users are strongly encouraged to upgrade to version 1.0.8.6 or later to mitigate this risk.

Affected Version(s)

Vvveb < 1.0.8.6

References

https://github.com/givanz/Vvveb/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/givanz/Vvveb/releases/tag/1.0.8.6
x_refsource_MISC

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.