Vulnerability · Published Mar 16, 2026 · Assigned by VulDB
CVE-2026-4239Lagom WHMCS Template Datatables prototype pollution
Low 3.5
In plain English
A low-severity prototype pollution in WHMCS Template from Lagom. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Lagom | WHMCS Template | 2.3.02.3.12.3.22.3.32.3.42.3.52.3.62.3.7 |
Weakness: CWE-1321, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
References
- VDB-351181 | Lagom WHMCS Template Datatables prototype pollution vdb-entry
- VDB-351181 | CTI Indicators (IOB, IOC, TTP) signature, permissions-required
- Submit #771350 | Lagom Lagom WHMCS Template * Prototype Pollution third-party-advisory
- https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/ exploit
- https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/blob/main/lagom-prototype-pollution-poc.js exploit