GHSA-PR6F-87HF-HX24
Vulnerability from github – Published: 2026-06-09 18:31 – Updated: 2026-07-31 19:24The 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.
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "limesurvey/limesurvey"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "7.0.0-beta1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-50636"
],
"database_specific": {
"cwe_ids": [
"CWE-89"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-31T19:24:23Z",
"nvd_published_at": "2026-06-09T18:17:10Z",
"severity": "HIGH"
},
"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 (\u0027...\u0027) 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\u0027s database user can access. The RemoteControl interface (RPCInterface = json/xml) must be enabled, which is not the default.",
"id": "GHSA-pr6f-87hf-hx24",
"modified": "2026-07-31T19:24:23Z",
"published": "2026-06-09T18:31:04Z",
"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"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "LimeSurvey has a SQL Injection issue"
}
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