How severe is CVE-2011-3379?

CVE-2011-3379 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2011-3379 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3379?

CVE-2011-3379 primarily affects Php. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3379?

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-2011-3379 published?

CVE-2011-3379 was published on 2011-11-03 and last updated on 2026-06-16.

CVE-2011-3379

CVE-2011-3379 is a high-severity vulnerability in Php 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: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Php
Published: 2011-11-03
Last modified: 2026-06-16

Description

The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders.

Frequently asked questions

What is CVE-2011-3379?: The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders.
How severe is CVE-2011-3379?: CVE-2011-3379 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-3379 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3379?: CVE-2011-3379 primarily affects Php. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3379?: 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-2011-3379 published?: CVE-2011-3379 was published on 2011-11-03 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:php:php:5.3.7:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.3.8:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

179.125.175.74 (ipv4-addr)