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SCA: security update for concrete5/concrete5 (GHSA-52pr-7vmf-2w7x)

high Tenable Self-Hosted Container Security Plugin ID 444706

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the Workflow,
 Form block, and File/Set components that lack the allowed_classes restriction. An unauthenticated attacker
 may trigger arbitrary PHP object instantiation if a malicious serialized payload has been placed in the
 database. Thanks XananasX7 and Sanjorn Keeratirungsan (dizconnect) for both independently reporting. The
 Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.4 with vector
 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. (CVE-2026-7888)

Solution

Update the concrete5/concrete5 library and its related packages to version 9.5.2 or later.

See Also

https://github.com/advisories/GHSA-52pr-7vmf-2w7x

Plugin Details

Severity: High

ID: 444706

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 7/14/2026

Updated: 7/14/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.95

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-7888

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.4

Threat Score: 5.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/3/2026

Vulnerability Publication Date: 6/3/2026

Reference Information

CVE: CVE-2026-7888

cwe: CWE-502