{"id":"CVE-2025-35939","aliases":["AIKIDO-2025-10090","AIKIDO-2025-10859","CLSA-2026-1774313530","EUVD-2025-13951","GHSA-7vrx-9684-xrf2"],"status":"published","title":"Craft CMS stores user-provided content in session files","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01373,"percentile":0.72362,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":true},"cwes":["CWE-472"],"published":"2025-05-07T22:41:29Z","modified":"2026-10-28T02:30:55Z","kev":{"date_added":"2025-06-02","due_date":"2025-06-23","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are 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cms","product":"craft cms"},{"vendor":"craftcms","product":"craft_cms"},{"vendor":"statamic","product":"cms"}],"references":[{"url":"https://github.com/craftcms/cms/pull/17220","tags":["Patch","fix","web"]},{"url":"https://github.com/craftcms/cms/releases/tag/4.15.3","tags":["Release Notes","web"]},{"url":"https://github.com/craftcms/cms/releases/tag/5.7.5","tags":["Release Notes","web"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-35939","tags":["VDB Entry","web"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-147-01.json","tags":["Third Party Advisory","web"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-35939","tags":["government-resource","US Government Resource","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-35939","tags":["advisory"]},{"url":"https://github.com/craftcms/cms/commit/e4c7bac8f31010aee048409f9ef6f744a83146b2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-7vrx-9684-xrf2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/35xxx/CVE-2025-35939.json","tags":["advisory"]},{"url":"https://github.com/craftcms/cms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-35939","title":"Craft CMS stores user-provided content in session files","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","status":"published","published":"2025-05-07T22:41:29.728Z","modified":"2026-02-26T18:28:42.701Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T14:32:51.199669Z"}],"euvd":[{"id":"EUVD-2025-13951","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","status":"published","published":"2025-05-07T22:41:29Z","modified":"2026-02-26T18:28:42Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"exploited_since":"2025-06-02","updated_at":"2026-11-02T19:48:16.990344Z"}],"ghsa":[{"id":"GHSA-7vrx-9684-xrf2","title":"Craft CMS stores arbitrary content provided by unauthenticated users in session files","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at `/var/lib/php/sessions`. Such session files are named `sess_[session_value]`, where `[session_value]` is provided to the client in a `Set-Cookie` response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","status":"published","published":"2025-05-08T00:31:12Z","modified":"2025-10-22T19:30:22Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:A","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:H","level":"medium"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T14:39:02.474737Z"}],"kev":[{"id":"CVE-2025-35939","title":"Craft CMS External Control of Assumed-Immutable Web Parameter Vulnerability","description":"Craft CMS contains an external control of assumed-immutable web parameter vulnerability. This vulnerability could allow an unauthenticated client to introduce arbitrary values, such as PHP code, to a known local file location on the server. This vulnerability could be chained with CVE-2024-58136 as represented by CVE-2025-32432.","cwes":["CWE-472"],"kev":{"date_added":"2025-06-02","due_date":"2025-06-23","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-35939","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","status":"published","published":"2025-05-07T23:15:54.103Z","modified":"2026-06-17T09:14:18.46Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T14:11:06.085152Z"}],"osv":[{"id":"CVE-2025-35939","title":"Craft CMS stores user-provided content in session files","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","status":"published","published":"2025-05-07T22:41:29.728Z","modified":"2026-10-28T02:30:55.891644804Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T15:44:48.342824Z"},{"id":"GHSA-7vrx-9684-xrf2","title":"Craft CMS stores arbitrary content provided by unauthenticated users in session files","description":"Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at `/var/lib/php/sessions`. Such session files are named `sess_[session_value]`, where `[session_value]` is provided to the client in a `Set-Cookie` response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.","status":"published","published":"2025-05-08T00:31:12Z","modified":"2025-10-22T19:55:21.9077Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:H","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:A","level":"medium"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T15:46:41.349637Z"},{"id":"CLSA-2026-1774313530","title":"TuxCare security update for craftcms/cms (10 CVEs)","description":"TuxCare rebuilt craftcms/cms to address 10 CVEs. Fixed in 3.9.15-p1+tuxcare.","status":"published","published":"2026-08-04T14:52:36Z","modified":"2026-10-15T09:47:59.588321197Z","updated_at":"2026-11-02T15:43:43.621843Z"}]}}