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HIGH severity

CVE-2018-20303 — gogs

HIGHFix: gogs/gogs@ff93d9d

CVE-2018-20303 is a high-severity (CVSS 7.5) Path Traversal vulnerability in gogs.io/gogs. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for gogs.io/gogs — see the affected versions and patch details below.

Gogs Directory Traversal

Also known asGHSA-9hxg-w7qf-hh93
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
3.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs89th percentile — riskier than 89% of all scored CVEsHighest risk
1.97%2.58%3.18%3.79%2.5%3.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹gogs.io/gogs

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogogs.io/gogsall versions0.11.80-0.20181218063808-ff93d9dbda5cgo get gogs.io/gogs@v0.11.80-0.20181218063808-ff93d9dbda5c

Affected Products

1 product · 1 configurations
Application
gogsgogs
< 0.11.82.1218
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

In pkg/tool/path.go in Gogs before 0.11.82.1218, a directory traversal i…

pentesterlab.comNVDJan 2019

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for gogs.io/gogs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update gogs.io/gogs to 0.11.80-0.20181218063808-ff93d9dbda5c or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-20303 is resolved across your whole dependency graph.

  3. Workarounds

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2018-20303: gogs Path Traversal — Fix Available