{"id":"CVE-2023-33175","aliases":["EUVD-2023-1558","GHSA-hh7j-pg39-q563","PYSEC-2026-555"],"status":"published","title":"ToUI allows user-specific variables to be shared between users","description":"ToUI is a Python package for creating user interfaces (websites and desktop apps) from HTML. ToUI is using Flask-Caching (SimpleCache) to store user variables. Websites that use `Website.user_vars` property. It affects versions 2.0.1 to 2.4.0. This issue has been patched in version 2.4.1.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00656,"percentile":0.51706,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-913","CWE-914"],"published":"2023-05-24T17:38:52Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"PyPI","package":"toui","fixed_in":["2.4.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"toui","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.1"},{"fixed":"2.4.1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"toui","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.1"},{"fixed":"2.4.1"}]}],"versions":["2.0.1","2.1.0","2.1.1","2.2.0","2.3.0","2.4.0"]},{"source":"osv","ecosystem":"PyPI","package":"toui","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.1"},{"fixed":"2.4.1"}]}],"versions":["2.0.1","2.1.0","2.1.1","2.2.0","2.3.0","2.4.0"]}],"products":[{"vendor":"mubarakalmehairbi","product":"toui"},{"vendor":"toui_project","product":"toui"}],"references":[{"url":"https://github.com/mubarakalmehairbi/ToUI/security/advisories/GHSA-hh7j-pg39-q563","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/mubarakalmehairbi/ToUI/releases/tag/v2.4.1","tags":["x_refsource_MISC","x_transferred","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-33175","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-hh7j-pg39-q563","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/33xxx/CVE-2023-33175.json","tags":["advisory"]},{"url":"https://github.com/mubarakalmehairbi/ToUI","tags":["package"]},{"url":"https://pypi.org/project/toui","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-33175","title":"ToUI allows user-specific variables to be shared between users","description":"ToUI is a Python package for creating user interfaces (websites and desktop apps) from HTML. ToUI is using Flask-Caching (SimpleCache) to store user variables. Websites that use `Website.user_vars` property. It affects versions 2.0.1 to 2.4.0. This issue has been patched in version 2.4.1.","status":"published","published":"2023-05-30T04:31:36.503Z","modified":"2025-01-10T20:35:07.109Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-914"],"updated_at":"2026-11-02T14:35:34.170609Z"}],"euvd":[{"id":"EUVD-2023-1558","description":"ToUI is a Python package for creating user interfaces (websites and desktop apps) from HTML. ToUI is using Flask-Caching (SimpleCache) to store user variables. Websites that use `Website.user_vars` property. It affects versions 2.0.1 to 2.4.0. This issue has been patched in version 2.4.1.","status":"published","published":"2023-05-30T04:31:36Z","modified":"2025-01-10T20:35:07Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T00:04:21.239531Z"}],"ghsa":[{"id":"GHSA-hh7j-pg39-q563","title":"toui allows user-specific variables to be shared between users","description":"### Impact\nWebsites that use `Website.user_vars` property in versions.\n\n### Patches\nIt affects versions v2.0.1 to v2.4.0. Please upgrade to v2.4.1\n\n### Workarounds\nDo not use `Website.user_vars` in websites when using versions v2.0.1 to v2.4.0. Also, do not use `Website.signin_user()` in version v2.4.0 only.\n\n### Explanation\nToUI is using Flask-Caching (SimpleCache) to store user variables. My misunderstanding was that these caches are stored in the client's browser, but it seems that these are stored in the server side.\n","status":"published","published":"2023-05-24T17:38:52Z","modified":"2023-11-04T05:03:36Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-913","CWE-914"],"updated_at":"2026-11-02T14:37:12.407027Z"}],"nvd":[{"id":"CVE-2023-33175","description":"ToUI is a Python package for creating user interfaces (websites and desktop apps) from HTML. ToUI is using Flask-Caching (SimpleCache) to store user variables. Websites that use `Website.user_vars` property. It affects versions 2.0.1 to 2.4.0. This issue has been patched in version 2.4.1.","status":"published","published":"2023-05-30T05:15:11.877Z","modified":"2026-06-17T06:01:14.137Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-914","CWE-913"],"updated_at":"2026-11-02T14:08:03.795015Z"}],"osv":[{"id":"CVE-2023-33175","title":"ToUI allows user-specific variables to be shared between users","description":"ToUI is a Python package for creating user interfaces (websites and desktop apps) from HTML. ToUI is using Flask-Caching (SimpleCache) to store user variables. Websites that use `Website.user_vars` property. It affects versions 2.0.1 to 2.4.0. This issue has been patched in version 2.4.1.","status":"published","published":"2023-05-30T04:31:36.503Z","modified":"2026-10-28T02:30:45.083196797Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-914"],"updated_at":"2026-11-02T15:44:32.116263Z"},{"id":"GHSA-hh7j-pg39-q563","title":"toui allows user-specific variables to be shared between users","description":"### Impact\nWebsites that use `Website.user_vars` property in versions.\n\n### Patches\nIt affects versions v2.0.1 to v2.4.0. Please upgrade to v2.4.1\n\n### Workarounds\nDo not use `Website.user_vars` in websites when using versions v2.0.1 to v2.4.0. Also, do not use `Website.signin_user()` in version v2.4.0 only.\n\n### Explanation\nToUI is using Flask-Caching (SimpleCache) to store user variables. My misunderstanding was that these caches are stored in the client's browser, but it seems that these are stored in the server side.\n","status":"published","published":"2023-05-24T17:38:52Z","modified":"2026-06-29T12:26:16.116446751Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-913","CWE-914"],"updated_at":"2026-11-02T15:46:49.28217Z"},{"id":"PYSEC-2026-555","title":"toui allows user-specific variables to be shared between users","description":"### Impact\nWebsites that use `Website.user_vars` property in versions.\n \n### Patches\nIt affects versions v2.0.1 to v2.4.0. Please upgrade to v2.4.1\n\n ### Workarounds\nDo not use `Website.user_vars` in websites when using versions v2.0.1 to v2.4.0. Also, do not use `Website.signin_user()` in version v2.4.0 only.\n \n### Explanation\nToUI is using Flask-Caching (SimpleCache) to store user variables. My misunderstanding was that these caches are stored in the client's browser, but it seems that these are stored in the server side.\n","status":"published","published":"2026-06-29T11:50:42.742671Z","modified":"2026-07-01T20:23:10.286587Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:52:57.671918Z"}]}}