CVE-2026-100184 codepeople CVE debrief

Who should care

WordPress administrators and defenders responsible for maintaining and securing WordPress deployments using the Calculated Fields Form plugin should assess exposure and prioritize verification and remediation efforts.

Why it matters

The Calculated Fields Form plugin for WordPress has a Reflected DOM-Based Cross-Site Scripting vulnerability, allowing unauthenticated attackers to inject web scripts into pages. Defenders should prioritize verification, remediation, and monitoring efforts.

• Defenders need to verify and update the Calculated Fields Form plugin to prevent potential exploitation.
• Successful exploitation could allow attackers to inject web scripts into pages, potentially leading to security incidents.
• Defenders should assess exposure in their WordPress deployments and monitor for potential exploitation attempts.
• Remediation priority is medium due to the CVSS score of 4.7 and MEDIUM severity.

Technical summary

The Calculated Fields Form plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the 'x (attacker-chosen name matching the form's url.<name> predefined value)' parameter in all versions up to, and including, 5.5.1.3. This is due to insufficient input sanitization and output escaping. The vulnerability allows unauthenticated attackers to inject web scripts into pages if a user can be tricked into performing an action like clicking a link. Exploitation requires that the targeted form has a Text Area field configured with a 'url.<name>' Predefined Value and predefinedClick disabled.

Defensive priority

Defenders should prioritize verifying and updating the Calculated Fields Form plugin to a fixed version, assessing exposure in their WordPress deployments, and monitoring for potential exploitation attempts.

Recommended defensive actions

• Verify and update the Calculated Fields Form plugin to a fixed version
• Assess exposure in WordPress deployments
• Monitor for potential exploitation attempts
• 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 vulnerability was reported by [email protected]. The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 4.7 and MEDIUM severity. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify and update the Calculated Fields Form plugin to a fixed version, assess exposure in their WordPress deployments, and monitor for potential exploitation attempts.

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.