CVE-2026-59519 Overview
CVE-2026-59519 is an information disclosure vulnerability affecting the Softaculous FormLayer plugin for WordPress. The flaw is classified under [CWE-201]: Insertion of Sensitive Information Into Sent Data. Affected versions include FormLayer releases up to and including 1.0.6. Unauthenticated remote attackers can retrieve embedded sensitive data by interacting with vulnerable form endpoints over the network. The issue does not affect integrity or availability, but it exposes confidential values that the plugin embeds in outbound data.
Critical Impact
Unauthenticated network attackers can retrieve sensitive data embedded by the FormLayer plugin in responses, exposing information intended to remain server-side.
Affected Products
- Softaculous FormLayer WordPress plugin, all versions through 1.0.6
- WordPress sites with FormLayer installed and active
- Sites exposing FormLayer form endpoints to unauthenticated visitors
Discovery Timeline
- 2026-07-05 - CVE-2026-59519 published to NVD
- 2026-07-07 - Last updated in NVD database
Technical Details for CVE-2026-59519
Vulnerability Analysis
The FormLayer plugin embeds sensitive information into data it sends to clients or downstream consumers. Because the plugin does not properly separate server-only values from response payloads, an unauthenticated attacker can request the affected endpoints and read data that should have remained internal. The exposure aligns with [CWE-201], where sensitive content is included in transmissions that reach untrusted parties. The attack requires no authentication and no user interaction, and it targets confidentiality only.
Root Cause
The root cause is improper separation between server-side context and outbound response data within the FormLayer plugin through version 1.0.6. Sensitive fields, such as configuration values or hidden form parameters, are serialized into responses that are reachable by any network client. The plugin lacks output filtering that would strip embedded secrets before transmission.
Attack Vector
The vulnerability is exploited over the network with low complexity and no privileges. An attacker issues HTTP requests to the WordPress endpoints exposed by FormLayer and parses the returned data for embedded sensitive values. No authenticated session or victim interaction is required, which enables opportunistic scanning against public WordPress deployments.
No verified public exploit code is available. Refer to the Patchstack Vulnerability Report for additional technical context.
Detection Methods for CVE-2026-59519
Indicators of Compromise
- Unauthenticated HTTP requests to FormLayer plugin endpoints under /wp-content/plugins/formlayer/ or associated AJAX/REST routes
- Response payloads containing configuration fields, API keys, or hidden inputs that should not be visible to visitors
- Repeated automated enumeration of form endpoints from a single source IP
Detection Strategies
- Inspect FormLayer HTTP responses for embedded sensitive keys, tokens, or internal identifiers
- Correlate WordPress access logs with plugin version data to identify sites running FormLayer 1.0.6 or earlier
- Alert on high-volume anonymous requests targeting FormLayer routes across the fleet
Monitoring Recommendations
- Enable request and response logging on WordPress reverse proxies or web application firewalls in front of affected sites
- Track plugin inventory to flag any WordPress instance still running FormLayer at or below version 1.0.6
- Monitor outbound egress from web servers for anomalous data patterns following form interactions
How to Mitigate CVE-2026-59519
Immediate Actions Required
- Identify all WordPress installations running the Softaculous FormLayer plugin and record installed versions
- Update FormLayer to a version later than 1.0.6 once the vendor publishes a fixed release
- Rotate any credentials, API tokens, or secrets that may have been embedded in FormLayer responses
Patch Information
At publication, the advisory identifies affected versions as FormLayer up to and including 1.0.6. Administrators should consult the Patchstack Vulnerability Report and the Softaculous plugin changelog for the fixed release and apply it through the WordPress plugin update mechanism.
Workarounds
- Deactivate and remove the FormLayer plugin on affected sites until a patched version is installed
- Restrict access to FormLayer endpoints via web application firewall rules or authenticated reverse proxy controls
- Audit plugin configuration to remove sensitive values from form definitions where feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
