CVE-2014-5203 Deserialization in n/a

What is CVE-2014-5203?

CVE-2014-5203 is a high-severity unsafe deserialization vulnerability in Wordpress Wordpress, published on 18 Aug 2014. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

wp-includes/class-wp-customize-widgets.php in the widget implementation in WordPress 3.9.x before 3.9.2 might allow remote attackers to execute arbitrary code via crafted serialized data.

Which versions are affected by CVE-2014-5203?

It affects 1 product.

Products include Wordpress Wordpress.

How do I fix CVE-2014-5203?

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-2014-5203 being exploited?

There is no known exploitation of CVE-2014-5203 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-2014-5203, GHSA-2wgg-mrqh-cxvr.