CVE-2011-4453

CVE-2011-4453 is a high-severity vulnerability in Pmwiki with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 52% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Description

The PageListSort function in scripts/pagelist.php in PmWiki 2.x before 2.2.35 allows remote attackers to execute arbitrary code via PHP sequences in a crafted order parameter in a pagelist directive, leading to unintended use of the PHP create_function function.

Frequently asked questions

What is CVE-2011-4453?
The PageListSort function in scripts/pagelist.php in PmWiki 2.x before 2.2.35 allows remote attackers to execute arbitrary code via PHP sequences in a crafted order parameter in a pagelist directive, leading to unintended use of the PHP create_function function.
How severe is CVE-2011-4453?
CVE-2011-4453 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-4453 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 52% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4453?
CVE-2011-4453 primarily affects Pmwiki. In total, 144 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4453?
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-2011-4453 published?
CVE-2011-4453 was published on 2011-12-22 and last updated on 2026-06-16.

References

Affected products (144)

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