Summary
The NewsmanApp WordPress plugin contains a stored cross-site scripting vulnerability in the billing_first_name and billing_last_name parameters. An unauthenticated attacker may store arbitrary web script that executes in a visitor's browser when the affected content is viewed, provided the Newsman Remarketing feature is enabled with a non-empty Remarketing ID.
The NewsmanApp WordPress plugin contains a stored cross-site scripting vulnerability in the billing_first_name and billing_last_name parameters. An unauthenticated attacker may store arbitrary web script that executes in a visitor's browser when the affected content is viewed, provided the Newsman Remarketing feature is enabled with a non-empty Remarketing ID.
Affected context
The issue affects NewsmanApp WordPress installations using the Newsman Remarketing feature with a non-empty Remarketing ID configured. It occurs where values associated with billing names are accepted without sufficient sanitization and later rendered without context-appropriate output escaping. The vulnerability is reported in plugin versions up to and including 3.7.29.
The issue affects NewsmanApp WordPress installations using the Newsman Remarketing feature with a non-empty Remarketing ID configured. It occurs where values associated with billing names are accepted without sufficient sanitization and later rendered without context-appropriate output escaping. The vulnerability is reported in plugin versions up to and including 3.7.29.
Exploit preconditions
- Attack surface: NewsmanApp-controlled WordPress pages or rendered plugin content
- Required access: No authentication is required to submit the affected input
- Trigger point: A user or administrator views a page containing the stored value
- Required configuration: The Newsman Remarketing feature must be enabled and a non-empty Remarketing ID must be configured
- Why exploitation is possible: User-controlled data can be stored and later rendered as browser-interpreted content without adequate sanitization and output encoding
- Attack surface: NewsmanApp-controlled WordPress pages or rendered plugin content
- Required access: No authentication is required to submit the affected input
- Trigger point: A user or administrator views a page containing the stored value
- Required configuration: The Newsman Remarketing feature must be enabled and a non-empty Remarketing ID must be configured
- Why exploitation is possible: User-controlled data can be stored and later rendered as browser-interpreted content without adequate sanitization and output encoding
Why this happens
The underlying defect is insufficient neutralization of untrusted input before it is stored and insufficient context-aware escaping when that data is rendered. This allows attacker-controlled values to be interpreted as active browser content rather than inert text. The behavior maps to CWE-79, which covers improper neutralization of input during web page generation.
The underlying defect is insufficient neutralization of untrusted input before it is stored and insufficient context-aware escaping when that data is rendered. This allows attacker-controlled values to be interpreted as active browser content rather than inert text. The behavior maps to CWE-79, which covers improper neutralization of input during web page generation.
Potential impact
- Malicious script may execute in the browser of a visitor viewing affected content
- An attacker could target authenticated users, including administrators
- Session data or page-visible information may be exposed
- Unauthorized actions could be performed through a victim's browser
- Site content, reputation, or downstream users may be affected
- Malicious script may execute in the browser of a visitor viewing affected content
- An attacker could target authenticated users, including administrators
- Session data or page-visible information may be exposed
- Unauthorized actions could be performed through a victim's browser
- Site content, reputation, or downstream users may be affected
General mitigation guidance
Mitigation generally centers on treating all externally supplied values as
untrusted throughout their lifecycle.
- Apply allowlist-based validation appropriate to billing-name fields
- Use context-aware output encoding at every rendering location
- Prefer secure-by-default rendering APIs that treat values as text
- Keep the Remarketing integration disabled when it is not required
- Restrict administrative privileges and review who can change plugin settings
- Avoid relying on client-side validation or filtering as the primary control
- Apply layered content security policies where practical to reduce browser-side impact
Mitigation generally centers on treating all externally supplied values as
untrusted throughout their lifecycle.
- Apply allowlist-based validation appropriate to billing-name fields
- Use context-aware output encoding at every rendering location
- Prefer secure-by-default rendering APIs that treat values as text
- Keep the Remarketing integration disabled when it is not required
- Restrict administrative privileges and review who can change plugin settings
- Avoid relying on client-side validation or filtering as the primary control
- Apply layered content security policies where practical to reduce browser-side impact
How teams detect issues like this
- Use static analysis to identify unsanitized request parameters reaching HTML output
- Review code paths involving billing_first_name and billing_last_name from input through storage and rendering
- Check that escaping is performed at the final output context rather than only during input handling
- Test plugin workflows with benign marker values and inspect rendered responses for unexpected interpretation
- Monitor stored content and logs for suspicious markup-like input or anomalous changes
- Enforce code-review policies requiring validation and context-aware escaping for user-controlled data
- Automated security scanners and review tools may help identify common reflected and stored XSS patterns
- Use static analysis to identify unsanitized request parameters reaching HTML output
- Review code paths involving billing_first_name and billing_last_name from input through storage and rendering
- Check that escaping is performed at the final output context rather than only during input handling
- Test plugin workflows with benign marker values and inspect rendered responses for unexpected interpretation
- Monitor stored content and logs for suspicious markup-like input or anomalous changes
- Enforce code-review policies requiring validation and context-aware escaping for user-controlled data
- Automated security scanners and review tools may help identify common reflected and stored XSS patterns
