CVE-2026-103998 10web CVE debrief

Who should care

Defenders responsible for WordPress installations with the Form Maker by 10Web plugin should assess exposure and prioritize verification and mitigation. This includes reviewing the plugin's version and applying patches or mitigations as recommended by the vendor. Additionally, defenders should verify the presence of this vulnerability in their inventory, particularly for systems with user-interactive functionality, and assess exposure to potential attacks.

Why it matters

CVE-2026-103998 is a Reflected Cross-Site Scripting vulnerability in the Form Maker by 10Web plugin for WordPress. Defenders should prioritize verifying the presence of this vulnerability in their inventory, particularly for systems with user-interactive functionality, and apply patches or mitigations as recommended by the vendor.

• User interaction is required for exploitation
• Successful exploitation can lead to injection of arbitrary web scripts
• Verify input sanitization and output escaping in versions up to 1.15.48
• Assess exposure for systems with user-interactive functionality

Technical summary

The Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'inputs (array key)' parameter in all versions up to, and including, 1.15.48 due to insufficient input sanitization and output escaping. The vulnerability allows unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The plugin's failure to properly sanitize input and escape output allows attackers to inject malicious scripts, potentially leading to unauthorized actions or data breaches.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their inventory and assess exposure, particularly for systems with user-interactive functionality.

Recommended defensive actions

• Verify the presence of this vulnerability in your inventory
• Assess exposure, particularly for systems with user-interactive functionality
• Apply patches or mitigations as recommended by the vendor
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including its existence in versions up to 1.15.48 of the Form Maker by 10Web plugin. The vulnerability is a Reflected Cross-Site Scripting vulnerability via the 'inputs (array key)' parameter. The source item and CVE record do not provide information on currently known affected systems or exploitation. Defenders should verify the presence of this vulnerability in their inventory, particularly for systems with user-interactive functionality, and apply patches or mitig

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.