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MEDIUM severity

CVE-2020-29556 — grav

MEDIUM

CVE-2020-29556 is a medium-severity (CVSS 5.5) Path Traversal vulnerability in getgrav/grav. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for getgrav/grav — see the affected versions and patch details below.

Grav CMS Local File Injection

Also known asGHSA-r3rg-jrjq-w4mr
Published
Updated
Affected
2 pkgs
Patched
1 / 2
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs62th percentile — riskier than 62% of all scored CVEsHighest risk
0.00%0.49%0.99%1.48%0.1%1.0%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

2 pkgs affected
🐘getgrav/grav🐘getgrav/grav

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

Description

The Backup functionality in Grav CMS through 1.7.0-rc.17 allows an authenticated attacker to read arbitrary local files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.)

Affected Packages

2 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistgetgrav/grav≥ 1.7.0-beta.1No fix
🐘Packagistgetgrav/gravall versions1.6.30composer require getgrav/grav:^1.6.30

Affected Products

1 product · 29 configurations
Application
grav cmsgetgrav
< 1.7.0
1 version
1.7.0
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.

The Backup functionality in Grav CMS through 1.7.0-rc.17 allows an authe…

blog.bssi.frNVDMar 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    A fix is available for CVE-2020-29556; check the affected-versions list above or the advisory for the patched release of getgrav/grav, then make sure no transitive dependency still pins the vulnerable range.

  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

The Backup functionality in Grav CMS through 1.7.0-rc.17 allows an authenticated attacker to read arbitrary local files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.)
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CVE-2020-29556: grav CSRF — Fixed in 1.6.30