HomeWordPress vulnerabilitiesConstant Contact Forms
Constant Contact Forms vulnerabilities
Constant Contact Forms has 1 known vulnerability in this database. The most recent published record is dated 18 Mar 2021.
- Known vulnerabilities
- 1
- Active installs
- 20,000+
- Latest version
- 2.21.0
- Last updated
- 6 Jul 2026
- Most recent
- 18 Mar 2021
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Cross-site scripting (XSS) CVE-2021-24134 | Medium 4.8 | Before 1.8.8 | Fixed in 1.8.8 | 18 Mar 2021 |
Read the published descriptions
- CVE-2021-24134, 18 Mar 2021
- Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed. CVE record
What to do if you run Constant Contact Forms
If you run Constant Contact Forms, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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