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Reverse-proxy takeover in Appsmith versions prior to 2.1 lets an authenticated low-privileged user abuse server-side request forgery to reach the bundled Caddy admin API, which ships with no authentication and listens on 0.0.0.0:2019 inside the container. By forcing the Appsmith server to issue a POST /load to that internal endpoint, the attacker rewrites the live Caddy configuration and seizes control of the reverse proxy that fronts the application. No public exploit identified at time of analysis and the issue is not in CISA KEV, but the vendor-confirmed CWE-749 exposure carries a 9.9 CVSS rating.
Authenticated command execution in Appsmith versions prior to 2.1 lets any administrator run arbitrary OS commands inside the application's Docker container. The bundled supervisord exposes an XML-RPC management interface on port 9001, which Appsmith's Caddy reverse proxy publishes externally at /supervisor/* on the public ingress; combined with the supervisord password being readable through GET /api/v1/admin/env, an admin can authenticate to supervisord and abuse twiddler.addProgramToGroup to spawn programs that execute shell commands. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV. Fixed in 2.1.
Server-side request forgery and internal network enumeration in Appsmith (prior to 1.99) is enabled by the POST /api/v1/admin/send-test-email endpoint accepting attacker-controlled smtpHost and smtpPort values, which JavaMail uses to establish raw TCP connections without IP address validation - completely bypassing the application's existing WebClientUtils.IP_CHECK_FILTER. Verbatim MailException error messages are returned in API responses, enabling authenticated administrators (or attackers who have compromised admin credentials) to probe internal network topology, enumerate open ports, and harvest service banners. No public exploit identified at time of analysis; the vulnerability is fixed in version 1.99.
Server-side request forgery in Appsmith prior to version 2.1 allows authenticated users to reach loopback-bound services inside the deployment container by exploiting a split code path in host validation logic. The WebClientUtils component used by REST API and GraphQL datasource plugins enforces only an exact-match string denylist, while the comprehensive address-class check covering loopback, any-local, link-local, and fc00::/7 IPv6 ranges exists solely on the SMTP plugin code path - leaving the HTTP path bypassable. No public exploit code has been identified at time of analysis, and this CVE does not appear in the CISA KEV catalog.
Server-side request forgery (SSRF) in Appsmith Dashboard component allows unauthenticated remote attackers to manipulate the computeDisallowedHosts function in WebClientUtils.java, enabling unauthorized server-side requests. Affecting all versions through 1.97, this vulnerability carries moderate real-world risk (CVSS 6.9, EPSS P) with publicly available exploit code. Vendor released patched version 1.99 and responded professionally to early disclosure.
Reverse-proxy takeover in Appsmith versions prior to 2.1 lets an authenticated low-privileged user abuse server-side request forgery to reach the bundled Caddy admin API, which ships with no authentication and listens on 0.0.0.0:2019 inside the container. By forcing the Appsmith server to issue a POST /load to that internal endpoint, the attacker rewrites the live Caddy configuration and seizes control of the reverse proxy that fronts the application. No public exploit identified at time of analysis and the issue is not in CISA KEV, but the vendor-confirmed CWE-749 exposure carries a 9.9 CVSS rating.
Authenticated command execution in Appsmith versions prior to 2.1 lets any administrator run arbitrary OS commands inside the application's Docker container. The bundled supervisord exposes an XML-RPC management interface on port 9001, which Appsmith's Caddy reverse proxy publishes externally at /supervisor/* on the public ingress; combined with the supervisord password being readable through GET /api/v1/admin/env, an admin can authenticate to supervisord and abuse twiddler.addProgramToGroup to spawn programs that execute shell commands. There is no public exploit identified at time of analysis, and it is not listed in CISA KEV. Fixed in 2.1.
Server-side request forgery and internal network enumeration in Appsmith (prior to 1.99) is enabled by the POST /api/v1/admin/send-test-email endpoint accepting attacker-controlled smtpHost and smtpPort values, which JavaMail uses to establish raw TCP connections without IP address validation - completely bypassing the application's existing WebClientUtils.IP_CHECK_FILTER. Verbatim MailException error messages are returned in API responses, enabling authenticated administrators (or attackers who have compromised admin credentials) to probe internal network topology, enumerate open ports, and harvest service banners. No public exploit identified at time of analysis; the vulnerability is fixed in version 1.99.
Server-side request forgery in Appsmith prior to version 2.1 allows authenticated users to reach loopback-bound services inside the deployment container by exploiting a split code path in host validation logic. The WebClientUtils component used by REST API and GraphQL datasource plugins enforces only an exact-match string denylist, while the comprehensive address-class check covering loopback, any-local, link-local, and fc00::/7 IPv6 ranges exists solely on the SMTP plugin code path - leaving the HTTP path bypassable. No public exploit code has been identified at time of analysis, and this CVE does not appear in the CISA KEV catalog.
Server-side request forgery (SSRF) in Appsmith Dashboard component allows unauthenticated remote attackers to manipulate the computeDisallowedHosts function in WebClientUtils.java, enabling unauthorized server-side requests. Affecting all versions through 1.97, this vulnerability carries moderate real-world risk (CVSS 6.9, EPSS P) with publicly available exploit code. Vendor released patched version 1.99 and responded professionally to early disclosure.