GHSA-PR6F-87HF-HX24

Vulnerability from github – Published: 2026-06-09 18:31 – Updated: 2026-07-31 19:24
VLAI
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.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7 (High)
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
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{
  "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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