PHP CVE-2026-109618 and CVE-2026-109619: Our Response and What WHMCS Customers Need to Do

On October 21, 2026, the PHP project released security updates for two critical vulnerabilities: CVE-2026-109618 and CVE-2026-109619. According to PHP, both vulnerabilities can allow unauthenticated...

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By Carlos

Security Update 2025-06-03

Today we have released updates for all actively supported and long-term support (LTS) versions of WHMCS, namely v8.13, v8.12, and v8.11. These updates resolve a number of security vulnerabilities...

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By Chen

Security Alert

We are aware that WHMCS customers may have received ransom notices. These notices claim data exfiltration that have occurred in different ways. The notice names the following businesses as their...

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By Matt

Security Update 2023-06-20

An important payment assertion issue and an XSS security issue have been identified that affect all versions of WHMCS. We have published new releases for active and LTS versions of WHMCS (v8.7 and...

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By David

Security Update 2022-11-30

A security issue has been identified that affects versions 8.5 and 8.6 of WHMCS. As a result, we have published new releases of WHMCS 8.5 and 8.6. All earlier versions of WHMCS are unaffected. ...

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By David

Security Update 2021-02-26

A security issue has been identified that affects all versions of WHMCS. As a result, we have published new releases for all actively supported versions of WHMCS as well as a patch which can be...

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By Matt

Security Advisory 2020-01-28

Hello, We are writing to advise you of a potential security vulnerability when htaccess directives are not enforced appropriately for WHMCS. This most commonly occurs in web server environments such...

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By Matt

Maintenance Releases for 7.5 and 7.6

Today we have released maintenance updates for the 7.5 and 7.6 series of WHMCS as well as promoted WHMCS 7.7 to General Availability. The 7.5 and 7.6 releases address usability and bug fix...

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By Matt

Security Patch Released for 7.3, 7.4 and 7.5

Four potential security issues have been identified in WHMCS 7.5 and earlier. It is recommended that you apply this patch as soon as possible. The issues resolved include: - Project permissions...

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By David