RCE in Contact Form By Supsystic
CVE-2026-115301
The Contact Form by Supsystic WordPress plugin before 1.11.1 does not sandbox the template engine used to render its forms and allows stored form-editor content to reach that engine as executable template code, enabling an administrator to perform server-side template injection and execute arbitrary code on the server. The injected template is compiled and executed whenever any visitor loads a page containing the form, so the stored payload also lets an unauthenticated visitor read server-side secrets such as authentication salts and database credentials.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (16.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Contact Form By Supsystic
Weakness classification (CWE)
References
- wpscan.com/vulnerability/15274345-5ad4-456f-9b5e-40d575ecb272/ (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-115301?
- CVE-2026-115301 is a high-severity vulnerability in Contact Form By Supsystic, classified under Code Injection. CVSS score: 7.2/10. Published 2026-10-29.
- How severe is CVE-2026-115301?
- High severity. CVSS v3 base score is 7.2 out of 10.