Server-Side Template Injection in formio

Description

A Server-Side Template Injection (SSTI) was discovered in Form.io 2.0.0. This leads to Remote Code Execution during deletion of the default Email template URL. NOTE: the email templating service was removed after 2020. Additionally, the vendor disputes this issue indicating this is sandboxed and only executable by admins.

Recommendation

No fix is available yet. Followings are affected versions:

• <= 2.0.0

References

• GHSA-52vj-mr2j-f8jh
• CVE-2020-28246
• CWE-74
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Formio improperly authorized permission elevation through specially crafted request path - CVE-2025-67718
• seajs Cross-site Scripting vulnerability - CVE-2024-51091
• Deserialization of Untrusted Data in bson - CVE-2020-7610
• Cross-site scripting in bootstrap-select - CVE-2019-20921

Tags:

npm

formio