Description
Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 1.99, the POST /api/v1/admin/send-test-email endpoint accepts attacker-controlled smtpHost and smtpPort values and establishes a raw JavaMail TCP connection without any IP validation. This completely bypasses WebClientUtils.IP_CHECK_FILTER, which only applies to Spring WebClient HTTP requests. Additionally, the raw MailException.getMessage() is returned verbatim in the API error response, enabling error-based internal port scanning and service banner enumeration. This vulnerability is fixed in 1.99.
Severity (CVSS)
| Base score | 5.1 |
|---|---|
| Severity | Medium |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-209 — CWE-209: Generation of Error Message Containing Sensitive Information
- CWE-918 — CWE-918: Server-Side Request Forgery (SSRF)
Affected products
| Vendor | Product | Versions |
|---|---|---|
| appsmithorg | appsmith | < 1.99 |
References
- https://github.com/appsmithorg/appsmith/security/advisories/GHSA-vvxf-f8q9-86gh (x_refsource_CONFIRM)
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.