GitHub Advisoryadvisory · Packagist

GHSA-8c7c-h7px-267g Concrete CMS is vulnerable to IDOR in surveys

MEDIUM Published 2026-05-22 Modified 2026-06-24 Official page ↗
Aliases
CVE-2026-8337
Ecosystem
Packagist
Packages
concrete5/concrete5
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weaknesses
CWE-565
Reviewed
2026-06-24

Affected packages

• Packagist concrete5/concrete5: < 9.5.1 → fixed in 9.5.1

Description

Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present on the site. An unauthenticated attacker can vote in the restricted survey by submitting the restricted optionID through the public survey’s endpoint.

Related

Alias · CVE (1)

  • CVE-2026-8337 Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. vulnerability

Weakness · CWE (1)

  • CWE-565 Reliance on Cookies without Validation and Integrity Checking weakness

References