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GHSA-hm3f-q6rw-m6wh
No affected components available
Impact
The PagesRouter static file serving route is vulnerable to a path traversal attack that allows unauthenticated reading of files outside the configured pagesPath directory. The boundary check uses a string prefix comparison without enforcing a directory separator boundary. An attacker can use path traversal sequences to access files in sibling directories whose names share the same prefix as the pages directory (e.g. pages-secret starts with pages).
This affects any Parse Server deployment with the pages feature enabled (pages.enableRouter: true). Exploitation requires a sibling directory of pagesPath whose name begins with the same string as the pages directory name.
Patches
The fix enforces a path separator boundary in the check, ensuring resolved paths must be strictly inside the pagesPath directory.
Workarounds
Ensure the pagesPath directory has no sibling directories whose names begin with the same prefix. For example, if pagesPath is /srv/pages, ensure no directory like /srv/pages-backup or /srv/pages_old exists alongside it.
References
- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh
- Fix for Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.8
- Fix for Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.8
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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