Insufficient URL Validation in Vvveb CMS Affects Admin Panel Security
CVE-2026-54507

8.4HIGH

Key Information:

Vendor

Givanz

Status
Vvveb
Vendor
CVE Published:
17 September 2026

What is CVE-2026-54507?

The Vvveb CMS exposes a vulnerability due to inadequate URL validation within the oEmbedProxy() handler. Admin-panel users with editor permissions can exploit this weakness by crafting malicious requests to the endpoint. This results in the handling of attacker-controlled URLs, potentially disclosing sensitive internal service responses or metadata. Notably, this vulnerability does not require CSRF tokens for exploitation. The issue has been addressed in version 1.0.8.5, emphasizing the urgent need for users to upgrade to mitigate risks.

Affected Version(s)

Vvveb < 1.0.8.5

References

https://github.com/givanz/Vvveb/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/givanz/Vvveb/commit/bd280f5ce136f6da22...
x_refsource_MISC
https://github.com/givanz/Vvveb/releases/tag/1.0.8.5
x_refsource_MISC

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.