{"id":"CVE-2026-50636","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-50636","summary":"LimeSurvey has a SQL Injection issue","details":"The RemoteControl API methods invite_participants and remind_participants pass a caller-supplied token-ID array into TokenDynamic::findUninvited(), which concatenates the values directly into a tid IN ('...') SQL clause without parameterization or input validation. A remote, authenticated attacker holding the tokens/update permission on a survey can inject a crafted array element to perform SQL injection. Because LimeSurvey configures its PDO connection with emulated prepared statements (emulatePrepare = true) and does not disable MySQL multi-statements, the injection supports stacked queries: the attacker can append arbitrary additional statements (INSERT/UPDATE/DELETE/DROP/CREATE) after the original SELECT. This permits both arbitrary read of any data in the database, such as administrator bcrypt password hashes (lime_users), survey response PII, session records, and global settings, all recoverable via a SLEEP() time-based blind oracle, and arbitrary write/destruction of that data, including directly overwriting the administrator password hash for immediate account takeover or dropping/truncating tables. Reads and writes extend to any schema the application's database user can access. The RemoteControl interface (RPCInterface = json/xml) must be enabled, which is not the default.","published":"2026-06-09T18:31:04Z","modified":"2026-07-31T19:30:46.498859744Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"limesurvey/limesurvey","fixedVersion":null}],"fix":{"url":"https://github.com/LimeSurvey/LimeSurvey/pull/5031","label":"LimeSurvey/LimeSurvey#5031"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50636"},{"type":"WEB","url":"https://github.com/LimeSurvey/LimeSurvey/pull/5031"},{"type":"WEB","url":"https://github.com/LimeSurvey/LimeSurvey/commit/4f383aa0bbe711f0064b319edb19fba759c50a33"},{"type":"WEB","url":"https://github.com/LimeSurvey/LimeSurvey/commit/98cfee55df97f9c82a72cf352bb204d51e588f7e"},{"type":"PACKAGE","url":"https://github.com/LimeSurvey/LimeSurvey"},{"type":"WEB","url":"https://www.limesurvey.org"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/limesurvey-remotecontrol-invite-participants-remind-participants-sql-injection"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T19:30:46.498859744Z"}}