Auth bypass in Concretecms Concrete Cms
CVE-2021-22967
In Concrete CMS (formerly concrete 5) below 8.5.7, IDOR Allows Unauthenticated User to Access Restricted Files If Allowed to Add Message to a Conversation.To remediate this, a check was added to verify a user has permissions to view files before attaching the files to a message in "add / edit message”.Concrete CMS security team gave this a CVSS v3.1 score of 4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCredit for discovery Adrian H
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 (65.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.6% 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 Affected version - Concrete 8.5.6 and below. Fixed version 9.0 and 8.5.7
Weakness classification (CWE)
References
- documentation.concretecms.org/developers/introduction/version-history/857-relea… (Release Notes, Vendor Advisory)
- hackerone.com/reports/869612 (Permissions Required)
Frequently asked questions
- What is CVE-2021-22967?
- CVE-2021-22967 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-2021-22967?
- High severity. CVSS v3 base score is 7.5 out of 10.