{"id":"CVE-2023-28131","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-28131","generatedAt":"2026-10-28T02:12:51.254Z","title":"A vulnerability in the expo.io framework allows an attacker to take over accounts and steal credentials on an application/website that configured the \"Expo AuthSession Redirect Proxy\" for social sign-in.","description":"A vulnerability in the expo.io framework allows an attacker to take over accounts and steal credentials on an application/website that configured the \"Expo AuthSession Redirect Proxy\" for social sign-in. This can be achieved once a victim clicks a malicious link. The link itself may be sent to the victim in various ways (including email, text message, an attacker-controlled website, etc).","published":"2023-04-24T05:15:09.000Z","lastModified":"2026-06-17T05:46:57.000Z","status":"Modified","sourceIdentifier":"cve@checkpoint.com","cvss":{"version":"3.1","score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"cwe":["CWE-522"],"affected":["expo/expo software development kit"],"epss":{"score":0.23165,"percentile":0.97751,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 23.2%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://blog.expo.dev/security-advisory-for-developers-using-authsessions-useproxy-options-and-auth-expo-io-e470fe9346df","tags":["Mitigation","Third Party Advisory"],"source":"cve@checkpoint.com"},{"url":"https://www.darkreading.com/endpoint/oauth-flaw-in-expo-platform-affects-hundreds-of-third-party-sites-apps","source":"cve@checkpoint.com"},{"url":"https://blog.expo.dev/security-advisory-for-developers-using-authsessions-useproxy-options-and-auth-expo-io-e470fe9346df","tags":["Mitigation","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.darkreading.com/endpoint/oauth-flaw-in-expo-platform-affects-hundreds-of-third-party-sites-apps","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-28131","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}