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Medium severity5.3NVD Advisory· Published May 21, 2026· Updated May 26, 2026

CVE-2026-8337

CVE-2026-8337

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. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with 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. Thanks  Zer0daySec https://github.com/Zee99y  for reporting

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
concrete5/concrete5Packagist
< 9.5.19.5.1

Affected products

3
  • Concrete5/Concrete5inferred3 versions
    <=9.5.0+ 2 more
    • (no CPE)range: <=9.5.0
    • cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*range: <9.5.1
    • (no CPE)range: <=9.5.0

Patches

Vulnerability mechanics

References

3

News mentions

1