What’s Vulnerable › Vulnerabilities

CVE-2021-22950

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-23 · updated 2026-06-17
• Weakness: CWE-352

Description

Concrete CMS prior to 8.5.6 had a CSFR vulnerability allowing attachments to comments in the conversation section to be deleted.Credit for discovery: "Solar Security Research Team"

Affected products

• Concrete CMS: before 8.5.6 — fixed in 8.5.6

How to fix

Upgrade to a fixed version: Concrete CMS 8.5.6. Check the vendor advisory for mitigations.

References

• https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes
• https://hackerone.com/reports/1102177
• https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes
• https://hackerone.com/reports/1102177

Get alerted when CVE-2021-22950 or the next vulnerability affects your stack