In Vanilla before 2.6.4, a flaw exists within the getSingleIndex function of the AddonManager class.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• vanillaforums vanillabefore 2.6.4

Other highest-scoring records for the same primary product.

• CVE-2016-10073The from method in library/core/class.email.php in Vanilla Forums before 2.3.1 allows remote attackers to spoof the email domain in sent mes
  55Plan
• CVE-2018-18903Vanilla 2.6.x before 2.6.4 allows remote code execution.
  41Plan
• CVE-2011-3614An Access Control vulnerability exists in the Facebook, Twitter, and Embedded plugins in Vanilla Forums before 2.0.17.9.
  40Plan
• CVE-2013-3528Unspecified vulnerability in the update check in Vanilla Forums before 2.0.18.8 has unspecified impact and remote attack vectors, related to
  32Monitor
• CVE-2011-3613An issue exists in Vanilla Forums before 2.0.17.9 due to the way cookies are handled.
  31Monitor
• CVE-2013-3527Multiple SQL injection vulnerabilities in Vanilla Forums before 2.0.18.8 allow remote attackers to execute arbitrary SQL commands via the pa
  31Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const file = path.join(ROOT, req.query.name);2res.sendFile(file);

1const file = path.resolve(ROOT, req.query.name);2if (!file.startsWith(ROOT + path.sep)) {3  return res.sendStatus(400);4}5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.