How severe is CVE-2012-0830?

CVE-2012-0830 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2012-0830 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-0830?

CVE-2012-0830 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-0830?

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-2012-0830 published?

CVE-2012-0830 was published on 2012-02-06 and last updated on 2026-06-16.

CVE-2012-0830

CVE-2012-0830 is a high-severity vulnerability in Php with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 30% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 30% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Php
Published: 2012-02-06
Last modified: 2026-06-16

Description

The php_register_variable_ex function in php_variables.c in PHP 5.3.9 allows remote attackers to execute arbitrary code via a request containing a large number of variables, related to improper handling of array variables. NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-4885.

Frequently asked questions

What is CVE-2012-0830?: The php_register_variable_ex function in php_variables.c in PHP 5.3.9 allows remote attackers to execute arbitrary code via a request containing a large number of variables, related to improper handling of array variables. NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-4885.
How severe is CVE-2012-0830?: CVE-2012-0830 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2012-0830 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-0830?: CVE-2012-0830 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-0830?: 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-2012-0830 published?: CVE-2012-0830 was published on 2012-02-06 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:php:php:5.3.9:*:*:*:*:*:*:*

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