What’s Vulnerable › Vulnerabilities

CVE-2021-22951

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-19 · updated 2026-06-17
• Weakness: CWE-639

Description

Unauthorized individuals could view password protected files using view_inline in Concrete CMS (previously concrete 5) prior to version 8.5.7. Concrete CMS now checks to see if a file has a password in view_inline and, if it does, the file is not rendered.For version 8.5.6, the following mitigations were put in place a. restricting file types for view_inline to images only b. putting a warning in the file manager to advise users.Credit for discovery: "Solar Security Research Team"Concrete CMS security team CVSS scoring is 5.3: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NThis fix is also in Concrete version 9.0.0

Affected products

• Concrete CMS: before 8.5.7 — fixed in 8.5.7

How to fix

Upgrade to a fixed version: Concrete CMS 8.5.7. Check the vendor advisory for mitigations.

References

• https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes
• https://hackerone.com/reports/1102014
• https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes
• https://hackerone.com/reports/1102014

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