Vulnerability · Published Oct 1, 2026 · Assigned by GitHub_M

CVE-2026-55230Vvveb: Stored XSS in Vvveb via sanitizeHTML() filter bypass using a quoted greater-than character

High 8.7

In plain English

A high-severity cross-site scripting in Vvveb from givanz. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)8.7High

Exploit odds (30 days)0.3%top 74.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to version 1.0.8.6, Vvveb's HTML sanitizer fails to strip event-handler attributes when a tag carries a greater-than character inside a quoted attribute value. A low-privilege content author (default role author or contributor) can store a payload in post or product content that runs JavaScript in a browser of every visitor and of any administrator who views or previews that content, which opens a path to admin account takeover. This issue has been patched in version 1.0.8.6.

Affected products (as reported)

Vendor	Product	Versions
givanz	Vvveb	< 1.0.8.6

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References

https://github.com/givanz/Vvveb/security/advisories/GHSA-97xr-82vc-wj2v x_refsource_CONFIRM
https://github.com/givanz/Vvveb/releases/tag/1.0.8.6 x_refsource_MISC