PT-2026-25713 · Lagom · Whmcs Template

S4Nnty + 1 · Published 2026-03-16 · Updated 2026-03-16 · CVE-2026-4239

Mitre

CVSS v3.1

3.5

3.5

Low

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

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.

Exploit

Fix

Code Injection

Prototype Pollution

Weakness Enumeration

CWE-94

CWE-1321

Related Identifiers

CVE-2026-4239

Affected Products

Whmcs Template

References · 7

• 🔥 https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/blob/main/lagom-prototype-pollution-poc.js · Exploit
• 🔥 https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-4239 · Security Note
• https://vuldb.com/?ctiid.351181 · Note
• https://vuldb.com/?id.351181 · Note
• https://vuldb.com/?submit.771350 · Note
• https://twitter.com/CVEnew/status/2033583639741796509 · Twitter Post