CVE-2013-3536: SQL injection vulnerability in the gp_LoadUserFromHash function in functions_hash.php in the Group Pay module

Q: How do I fix CVE-2013-3536?

group pay: upgrade to newer than 1.5. Exact commands for each OS are on this page.

Q: Is CVE-2013-3536 being exploited?

CVE-2013-3536 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2013-3536 affect?

CVE-2013-3536 affects group pay. Severity is high (CVSS 7.5). SQL injection vulnerability in the gp_LoadUserFromHash function in functions_hash.php in the Group Pay module 1.5 and earlier for WHMCS allows remote attackers to execute arbitrary SQL commands via the hash parameter.

Q: How urgent is CVE-2013-3536?

Priority 52/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2013-3536 is a high-severity flaw (CVSS 7.5) affecting group pay. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL injection vulnerability in the gp_LoadUserFromHash function in functions_hash.php in the Group Pay module 1.5 and earlier for WHMCS allows remote attackers to execute arbitrary SQL commands via the hash parameter.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-89
Published	2013-05-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: whmcs

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-05-13 23:55 UTCPublished CVE record published
2026-06-16 23:55 UTCUpdated Record last modified

whmcs group pay UPGRADE

Affected: <= 1.5

Fixed in: newer than 1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy group-pay || rpm -q group-pay || group-pay --version

2. UPGRADE to newer than 1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade group-pay

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade group-pay

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WHMCompleteSolution (WHMCS) Group Pay Plugin 1.5 - 'grouppay.php?hash' SQL Injection

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-3536?

group pay: upgrade to newer than 1.5. Exact commands for each OS are on this page.

Is CVE-2013-3536 being exploited?

CVE-2013-3536 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-3536 affect?

CVE-2013-3536 affects group pay. Severity is high (CVSS 7.5). SQL injection vulnerability in the gp_LoadUserFromHash function in functions_hash.php in the Group Pay module 1.5 and earlier for WHMCS allows remote attackers to execute arbitrary SQL commands via the hash parameter.

How urgent is CVE-2013-3536?

Priority 52/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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