How severe is CVE-2011-5061?

CVE-2011-5061 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2011-5061 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-5061?

CVE-2011-5061 primarily affects Whmcs Whmcompletesolution. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-5061?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-5061 published?

CVE-2011-5061 was published on 2012-01-14 and last updated on 2026-06-16.

CVE-2011-5061

CVE-2011-5061 is a high-severity vulnerability in Whmcs Whmcompletesolution with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Whmcs Whmcompletesolution
Published: 2012-01-14
Last modified: 2026-06-16

Description

functions.php in WHMCompleteSolution (WHMCS) 4.0.x through 5.0.x allows remote attackers to trigger arbitrary code execution in the Smarty templating system by submitting a crafted ticket, related to improper handling of characters in the subject field.

Frequently asked questions

What is CVE-2011-5061?: functions.php in WHMCompleteSolution (WHMCS) 4.0.x through 5.0.x allows remote attackers to trigger arbitrary code execution in the Smarty templating system by submitting a crafted ticket, related to improper handling of characters in the subject field.
How severe is CVE-2011-5061?: CVE-2011-5061 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-5061 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-5061?: CVE-2011-5061 primarily affects Whmcs Whmcompletesolution. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-5061?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-5061 published?: CVE-2011-5061 was published on 2012-01-14 and last updated on 2026-06-16.

References

Affected products (23)

cpe:2.3:a:whmcs:whmcompletesolution:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.1.2:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.2.0:beta_r1:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.2.0:beta_r2:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.2.0:beta_r3:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.3.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.4.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.4.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.4.2:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.5.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:4.5.2:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:whmcs:whmcompletesolution:5.0.3:*:*:*:*:*:*:*

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CVE-2012-0693 — Medium (CVSS 5.0): submitticket.php in WHMCompleteSolution (WHMCS) 5.03 allows remote attackers to inject arbitrary code into a subject…
CVE-2011-4813 — Medium (CVSS 5.0): Directory traversal vulnerability in clientarea.php in WHMCompleteSolution (WHMCS) 3.x.x allows remote attackers to…
CVE-2011-4810 — Medium (CVSS 5.0): Multiple directory traversal vulnerabilities in WHMCompleteSolution (WHMCS) 3.x and 4.x allow remote attackers to read…

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