{"id":"CVE-2026-109937","aliases":["EUVD-2026-103390","GHSA-m5fx-f9px-4463"],"status":"published","title":"Otter Blocks \u003c 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block","description":"The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00146,"percentile":0.03858,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2026-10-18T06:00:14Z","modified":"2026-10-19T21:02:51Z","products":[{"vendor":"unknown","product":"otter blocks"}],"references":[{"url":"https://wpscan.com/vulnerability/9765313d-c879-457f-851f-dab74b8d90a0/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109937"},{"url":"https://wpscan.com/vulnerability/9765313d-c879-457f-851f-dab74b8d90a0"},{"url":"https://github.com/advisories/GHSA-m5fx-f9px-4463"}],"sources":{"cve":[{"id":"CVE-2026-109937","title":"Otter Blocks \u003c 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block","description":"The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.","status":"published","published":"2026-10-18T06:00:14.838Z","modified":"2026-10-18T11:12:31.318Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:20:11.24076Z"}],"euvd":[{"id":"EUVD-2026-103390","description":"The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.","status":"published","published":"2026-10-18T06:00:14Z","modified":"2026-10-18T11:12:31Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T17:00:00.923575Z"}],"ghsa":[{"id":"GHSA-m5fx-f9px-4463","title":"The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL...","description":"The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.","status":"published","published":"2026-10-18T09:30:22Z","modified":"2026-10-18T12:30:26Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:13:54.281657Z"}],"nvd":[{"id":"CVE-2026-109937","description":"The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.","status":"published","published":"2026-10-18T07:16:50.927Z","modified":"2026-10-19T21:02:51.987Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:13:00.123071Z"}]}}