Home→Vulnerabilities→CVE-2026-8337
Disclosed

CVE-2026-8337

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

Share this vulnerability:

Exploitation Probability (EPSS)

Low Priority
0.05%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

1 events
May 21, 2026
Vulnerability Disclosed
Published to component-level vulnerability database.

Threat Actor Attribution

PREMIUM INTEL
Associated Groups:Lazarus Group, APT28
Ransomware Campaigns:LockBit 3.0, BlackCat
IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

References

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notesConcretecms

Am I Vulnerable?

Check your domain or package.json for CVE-2026-8337 exposure.

Share This Page

Help others discover this vulnerability information

Vulnerability Details

CVSS Base Score
N/A/ 10
Published Date
May 21, 2026
Last Modified
May 21, 2026
Need API Access?

Integrate this data into your SOAR platform.

View Plans →
Need Manual Validation?

Automated scanners flag false positives. Get a manual pentest validation for this CVE.