Automattic Mongoose through 5.7.4 allows attackers to bypass access control (in some applications) because any query object with a _bsontype attribute is ignored. For example, adding “_bsontype”:”a” can sometimes interfere with a query filter. NOTE: this CVE is about Mongoose’s failure to work around this _bsontype special case that exists in older versions of the bson parser (aka the mongodb/js-bson project).
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-17426
- https://github.com/Automattic/mongoose/commit/f3eca5b94d822225c04e96cbeed9f095afb3c31c
- https://github.com/Automattic/mongoose/issues/8222
- https://github.com/Automattic/mongoose/commits/4.13.21
- https://github.com/Automattic/mongoose/releases/tag/4.13.21
- https://github.com/advisories/GHSA-8687-vv9j-hgph