Auth bypass in Concretecms Concrete Cms
CVE-2021-22951
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
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Concretecms Concrete Cms
- Https://github.com/concrete5/concrete5 — versions Fixed version Concrete CMS 8.5.7 and 9.0
Weakness classification (CWE)
References
- documentation.concretecms.org/developers/introduction/version-history/857-relea… (Release Notes, Vendor Advisory)
- hackerone.com/reports/1102014 (Permissions Required, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22951?
- CVE-2021-22951 is a high-severity vulnerability in Concretecms Concrete Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2021-11-19.
- How severe is CVE-2021-22951?
- High severity. CVSS v3 base score is 7.5 out of 10.