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CVE-2026-5110
CVE-2026-5110: high vulnerability affecting the affected product. Check CVSS, KEV status, business impact and recommended administrator actions.
- CVSS
- 7.2 HIGH
- EPSS
- 16.09%
- Known exploited
- not in KEV
- Product
- -
What is known
The Gravity Forms plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting in versions up to and including 2.10.0. This is due to insufficient input validation and output escaping in the SingleProduct field when used inside a Repeater field. When SingleProduct fields are nested within Repeater fields, the validation flow bypasses the state validation mechanism (failed_state_validation()) that would normally prevent tampering with field values. The validate_subfield() method only calls the field's validate() method, which for SingleProduct fields only validates the quantity field and does not check the product name field for tampering. As a result, an attacker can inject arbitrary HTML and JavaScript into the product name field (input .1). This malicious input is then saved to the database without sanitization because sanitize_entry_value() returns raw values when HTML is not expected for the field type. When an administrator views the entry in wp-admin/admin.php?page=gf_entries, the get_value_entry_detail() method outputs the product name without escaping, causing the stored XSS payload to execute in the administrator's browser. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses an entry containing the malicious payload.
Business impact
Successful exploitation of CVE-2026-5110, a high vulnerability (CVSS 7.2) affecting the affected product, may affect the confidentiality, integrity or availability of the vulnerable environment. The exact impact depends on the installed version, exposed interfaces and deployment configuration.
Recommended administrator action
Confirm whether the affected product is present and compare installed versions with the vendor advisory and NVD record. Apply the vendor patch or documented mitigation; until remediation is complete, reduce exposure of affected interfaces, review relevant logs and monitor for indicators of exploitation. DataHouse can support version verification, managed patching, network exposure reduction, log review and backup validation for dedicated, cloud and colocated environments.