CVE-2021-22954Network attack vector

Unauthorized requests via exposed JavaScript CSRF token

Published Feb 9, 2022 · Updated Aug 3, 2024

Cross-site request forgery in Concrete CMS before 9.0.0 allows remote attackers to submit requests as other users through a malicious site. Affected releases place the CSRF token in dynamically generated JavaScript, allowing cross-origin retrieval and reuse in forged requests. Exploitation requires a victim's authenticated browser context; resulting requests carry that user's session authority and can perform any action reachable by that user.

CVSS severity4.8
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Concrete CMS before 9.0.0 allows remote attackers to submit requests as other users through a malicious site. Affected releases place the CSRF token in dynamically generated JavaScript, allowing cross-origin retrieval and reuse in forged requests. Exploitation requires a victim's authenticated browser context; resulting requests carry that user's session authority and can perform any action reachable by that user.

The record

CVE
CVE-2021-22954
Published
Feb 9, 2022
Updated
Aug 3, 2024
Vendor
Concrete CMS
Product
Concrete CMS
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=fixed in Concrete CMS v 9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Concrete CMS · Concrete CMSversion=fixed in Concrete CMS v 9.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
4.8Concrete CMS Security TeamCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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