CVE-2026-81895Network attack vectorHinoki check available

Stored SQL injection via unvalidated file-set identifiers

Published Sep 15, 2026 · Updated Sep 15, 2026

Stored SQL injection in the Document Library block in Concrete CMS before 9.5.3 allows remote authenticated users to execute SQL via fsID[]. The block stores file-set identifiers without integer validation and, in any-set mode, concatenates each stored value into a filter query without casting or binding. Exploitation requires block-editing permission, and rendering the published page executes the stored expression with the application's database privileges.

CVSS severity8.5
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored SQL injection in the Document Library block in Concrete CMS before 9.5.3 allows remote authenticated users to execute SQL via fsID[]. The block stores file-set identifiers without integer validation and, in any-set mode, concatenates each stored value into a filter query without casting or binding. Exploitation requires block-editing permission, and rendering the published page executes the stored expression with the application's database privileges.

The record

CVE
CVE-2026-81895
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Concrete CMS
Product
Concrete CMS
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record 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=5.0.0 <=9.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Concrete CMS · Concrete CMSversion=5.0.0 <=9.5.2

Published CVSS scores

8.5Concrete CMS security teamCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

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-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

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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