HomeWordPress vulnerabilitiesContact Form by Supsystic
Contact Form by Supsystic vulnerabilities
Contact Form by Supsystic has 5 known vulnerabilities in this database. The most recent published record is dated 5 Sep 2026.
- Known vulnerabilities
- 5
- Active installs
- 6,000+
- Latest version
- 1.10.4
- Last updated
- 19 Sep 2026
- Most recent
- 5 Sep 2026
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-2026-83625 | High 7.2 | Up to 1.10.2 | Fixed in a later version (latest 1.10.4) | 5 Sep 2026 |
| Remote code execution CVE-2026-4257 | Critical 9.8 | Up to 1.7.36 | Fixed in a later version (latest 1.10.4) | 30 Mar 2026 |
| Cross-site request forgery (CSRF) CVE-2024-13452 | Medium 6.1 | Up to 1.7.29 | Fixed in a later version (latest 1.10.4) | 16 Apr 2025 |
| Cross-site request forgery (CSRF) CVE-2023-2528 | Medium 5.4 | Up to 1.7.24 | Fixed in a later version (latest 1.10.4) | 17 May 2023 |
| Cross-site scripting (XSS) CVE-2021-24276 | Medium 6.1 | Before 1.7.15 | Fixed in 1.7.15 | 5 May 2021 |
Read the published descriptions
- CVE-2026-83625, 5 Sep 2026
- The Contact Form by Supsystic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via IP Address Header in all versions up to, and including, 1.10.2 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. An unauthenticated attacker can first call the 'updateNonce' action - which is accessible without authentication due to its absence from the plugin's permission list - to obtain a valid nonce, then submit a contact form with a malicious payload in a spoofed IP header such as X-Forwarded-For. CVE record
- CVE-2026-4257, 30 Mar 2026
- The Contact Form by Supsystic plugin for WordPress is vulnerable to Server-Side Template Injection (SSTI) leading to Remote Code Execution (RCE) in all versions up to, and including, 1.7.36. This is due to the plugin using the Twig `Twig_Loader_String` template engine without sandboxing, combined with the `cfsPreFill` prefill functionality that allows unauthenticated users to inject arbitrary Twig expressions into form field values via GET parameters. This makes it possible for unauthenticated attackers to execute arbitrary PHP functions and OS commands on the server by leveraging Twig's `registerUndefinedFilterCallback()` method to register arbitrary PHP callbacks. CVE record
- CVE-2024-13452, 16 Apr 2025
- The Contact Form by Supsystic plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.7.29. This is due to missing or incorrect nonce validation on a saveAsCopy function. This makes it possible for unauthenticated attackers to update settings and inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. CVE record
- CVE-2023-2528, 17 May 2023
- The Contact Form by Supsystic plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.7.24. This is due to missing or incorrect nonce validation on the AJAX action handler. This makes it possible for unauthenticated attackers to execute AJAX actions via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. CVE record
- CVE-2021-24276, 5 May 2021
- The Contact Form by Supsystic WordPress plugin before 1.7.15 did not sanitise the tab parameter of its options page before outputting it in an attribute, leading to a reflected Cross-Site Scripting issue CVE record
What to do if you run Contact Form by Supsystic
If you run Contact Form by Supsystic, 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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