What’s Vulnerable › Vulnerabilities

CVE-2021-40102

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-24 · updated 2026-06-17
• Weakness: CWE-502

Description

An issue was discovered in Concrete CMS through 8.5.5. Arbitrary File deletion can occur via PHAR deserialization in is_dir (PHP Object Injection associated with the __wakeup magic method).

Affected products

• Concrete CMS: through 8.5.5

References

• https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes
• https://hackerone.com/reports/921288
• https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes
• https://hackerone.com/reports/921288

Get alerted when CVE-2021-40102 or the next vulnerability affects your stack