CVE-2021-22967

mediumpriority · track · 30EPSS 0.011 · 67 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.15% (67th) EPSS

CVSS 5 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-28

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

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-639USprimaryCWE-200USCWE-639US

affected products (3)

Products and version ranges known to be affected.

n/a https://github.com/concrete5/concrete5≤ Affected version - Concrete 8.5.6 and below. Fixed version 9.0 and 8.5.7enisa_euvdEU
concretecms concrete cms< 8.5.7nvdUScpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*
Packagist concrete5/core< 8.5.7osvUSpkg:composer/concrete5/core

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-m2v2-8227-59f5Exposure of sensitive information in concrete5/core2021-11-23ghsa · osvUS
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”.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-11-19modified 2026-06-17

related (3,342)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-55255US	—OT critical	0.89% (59th)	KEV	2026-06-23
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoin…
CVE-2023-6875US	critical9.8OT critical	90.3% (100th)	Exploit	2024-01-11
The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification…
CVE-2021-45428US	critical9.8	56.9% (99th)	Exploit	2022-01-03
TLR-2005KSH is affected by an incorrect access control vulnerability. THe PUT method is enabled so an attacker can upload arbitrary files including HTML and CGI formats.
CVE-2019-13360US	critical9.8	24.4% (98th)	Exploit	2019-07-16
In CentOS-WebPanel.com (aka CWP) CentOS Web Panel 0.9.8.836, remote attackers can bypass authentication in the login process by leveraging knowledge of a valid username.
CVE-2019-17382US	critical9.1	54.1% (99th)	—	2019-10-09
An issue was discovered in zabbix.php?action=dashboard.view&dashboardid=1 in Zabbix through 4.4. An attacker can bypass the login page and access the dashboard page, and then creat…

+3337 more

references (7)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan