Cross-Site Scripting (XSS) in Connect Contact Form 7 and Mailchimp (WordPress plugin) (CVE-2026-15000)
Summary
Cross-site scripting in Connect Contact Form 7 and Mailchimp (WordPress plugin) (CVE-2026-15000). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
The Connect Contact Form 7 and Mailchimp plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Mailchimp Merge Field Values in all versions up to, and including, 0.9.78.06 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is only triggered when a privileged user (Administrator) performs a Contact Lookup for the email address submitted via the CF7 form, meaning execution is deferred until an administrator interacts with the affected entry.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-15000 has been found in Connect Contact Form 7 and Mailchimp (WordPress plugin).
Risk of unauthorized operations or information disclosure. CVSS score: 7.2/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Connect Contact Form 7 and Mailchimp (WordPress plugin) CVE-2026-15000" on the vendor's site.
CVE-2026-15000 (Connect Contact Form 7 and Mailchimp (WordPress plugin)) — CWE-79 / CVSS v3 7.2
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in Connect Contact Form 7 and Mailchimp (WordPress plugin).
Check the vendor advisory for the affected versions of Connect Contact Form 7 and Mailchimp (WordPress plugin).
Severity: High (CVSS 7.2/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Connect Contact Form 7 and Mailchimp (WordPress plugin) を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web nvd.nist.gov
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web github.com