CVE-2026-4239

2.0 lowEPSS 0.2%

Low (2.0). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

2.0 low

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

CVSS 3.1

3.5 low

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-31)
CWEs: CWE-94, CWE-1321
Published: 2026-03-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/
https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/blob/main/lagom-prototype-pollution-poc.js
https://vuldb.com/?ctiid.351181
https://vuldb.com/?id.351181
https://vuldb.com/?submit.771350

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