CVE-2013-4338 Deserialization in n/a

What is CVE-2013-4338?

CVE-2013-4338 is a high-severity unsafe deserialization vulnerability in Wordpress Wordpress, published on 12 Sep 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

wp-includes/functions.php in WordPress before 3.6.1 does not properly determine whether data has been serialized, which allows remote attackers to execute arbitrary code by triggering erroneous PHP unserialize operations.

Weakness: CWE-94

Which versions are affected by CVE-2013-4338?

It affects 1 product.

Products include Wordpress Wordpress.

How do I fix CVE-2013-4338?

Upgrade to a fixed version.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2013-4338 being exploited?

There is no known exploitation of CVE-2013-4338 in the wild and no public exploit code.

Other vulnerabilities in Wordpress Wordpress

• CVE-2026-63030 WordPress Core Interpretation Conflict Exploited Critical 9.8
• CVE-2026-87902 WordPress Core Remote File Inclusion Exploited High 8.1
• CVE-2026-60137 WordPress Core SQL Injection Exploited Medium 5.9
• CVE-2012-2399 Cross-site scripting in n/a Critical 10.0
• CVE-2012-2400 Other in n/a Critical 10.0

All Wordpress Wordpress vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2013-4338, GHSA-j273-w3x2-xgpg.