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Description

A vulnerability has been found in Lagom WHMCS Template up to 2.4.2. This impacts an unknown function of the component Datatables. The manipulation leads to resource consumption. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-04-19 | Published 2026-04-20 | Updated 2026-04-20 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
MEDIUM: 4.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.0AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Resource Consumption

Denial of Service

Product status

2.4.0
affected

2.4.1
affected

2.4.2
affected

Timeline

2026-04-19:Advisory disclosed
2026-04-19:VulDB entry created
2026-04-19:VulDB entry last update

Credits

s4nnty (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/358236 (VDB-358236 | Lagom WHMCS Template Datatables resource consumption) vdb-entry

vuldb.com/vuln/358236/cti (VDB-358236 | CTI Indicators (IOB, IOC, TTP)) signature permissions-required

vuldb.com/submit/791943 (Submit #791943 | Lagom WHMCS Template ≤ 2.4.2 Denial of Service) third-party-advisory

github.com/devsamuelsantiago/lagom-whmcs-dos-poc exploit

cve.org (CVE-2026-6601)

nvd.nist.gov (CVE-2026-6601)

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