CVE-2026-4239

LOW

Lagom WHMCS Template Datatables prototype pollution

Title source: cna
STIX 2.1

Description

A vulnerability was found in Lagom WHMCS Template up to 2.3.7. Impacted is an unknown function of the component Datatables. The manipulation results in improperly controlled modification of object prototype attributes. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

References (5)

Core 5
Core References
Vdb Entry vdb-entry
VDB-351181 | Lagom WHMCS Template Datatables prototype pollution
https://vuldb.com/?id.351181
Signature, Permissions Required signature permissions-required
VDB-351181 | CTI Indicators (IOB, IOC, TTP)
https://vuldb.com/?ctiid.351181
Third Party Advisory third-party-advisory
Submit #771350 | Lagom Lagom WHMCS Template * Prototype Pollution
https://vuldb.com/?submit.771350

Scores

CVSS v3 3.5
EPSS 0.0004
EPSS Percentile 13.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1321 CWE-94
Status published
Products (8)
Lagom/WHMCS Template 2.3.0
Lagom/WHMCS Template 2.3.1
Lagom/WHMCS Template 2.3.2
Lagom/WHMCS Template 2.3.3
Lagom/WHMCS Template 2.3.4
Lagom/WHMCS Template 2.3.5
Lagom/WHMCS Template 2.3.6
Lagom/WHMCS Template 2.3.7
Published Mar 16, 2026
Tracked Since Mar 16, 2026