Risk Letters

Exploited vulnerability

CVE-2026-103039

TLP:CLEAR

Deserialization of Untrusted Data

The Gravity Forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.2 via a Post Custom Field whose input type is List. This is due to GFFormsModel::create_post() passing the submitted value to WordPress' unrestricted global maybe_unserialize() rather than the plugin's own hardened GFCommon::maybe_unserialize(), which was added in 3.1.1 and passes

Facts

  • Vendor: Gravity Forms
  • Product: Gravity Forms
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 0.5 %
  • First known exploitation: 30 October 2026
  • First seen by Risk Letters: 30 October 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD