CVE-2022-43686Network attack vector

Authenticated denial of service via unbounded cookie rows

Published Nov 14, 2022 · Updated Apr 30, 2025

Uncontrolled allocation in Concrete CMS before 8.5.10 and 9.0.0 through 9.1.2 allows remote attackers to cause high load. The persistent-login cookie path inserts a hashed token into authTypeConcreteCookieMap without limiting per-account rows, while validation scans the accumulated tokens. A valid site account and repeated cookie generation are required; the growing table drives excessive database work and interrupts service availability.

CVSS severity6.5
Medium
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled allocation in Concrete CMS before 8.5.10 and 9.0.0 through 9.1.2 allows remote attackers to cause high load. The persistent-login cookie path inserts a hashed token into authTypeConcreteCookieMap without limiting per-account rows, while validation scans the accumulated tokens. A valid site account and repeated cookie generation are required; the growing table drives excessive database work and interrupts service availability.

The record

CVE
CVE-2022-43686
Published
Nov 14, 2022
Updated
Apr 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8Concrete CMS Security TeamCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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