CVE-2018-20303: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

May 14, 2022 (updated July 25, 2023)

In pkg/tool/path.go in Gogs before 0.11.82.1218, a directory traversal in the file-upload functionality can allow an attacker to create a file under data/sessions on the server, a similar issue to CVE-2018-18925.

References

github.com/advisories/GHSA-9hxg-w7qf-hh93
github.com/gogs/gogs/commit/ff93d9dbda5cebe90d86e4b7dfb2c6b8642970ce
github.com/gogs/gogs/issues/5558
nvd.nist.gov/vuln/detail/CVE-2018-20303
pentesterlab.com/exercises/cve-2018-18925/

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