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MEDIUM severity

SilverStripe Vulnerability on 'isDev', 'isTest' and 'flush' $_GET validationGHSA-g4hp-pfvf-vm5w

MEDIUMFix: silverstripe/silverstripe-framework@a978b89

GHSA-g4hp-pfvf-vm5w is a medium-severity (CVSS 6.5) vulnerability in silverstripe/framework. A fix is available for silverstripe/framework — see the affected versions and patch details below.

Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 28, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected
🐘silverstripe/framework🐘silverstripe/framework

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

When a secure token parameter is provided to a SilverStripe site (such as isDev or flush) an empty token parameter can be provided in order to bypass normal authentication parameters.

For instance, http://www.mysite.com/?isDev=1&isDevtoken will force a site to dev mode. Alternatively, "flush" could also be used in succession to cause excessive load on a victim site and risk denial of service.

The fix in this case is to ensure that empty tokens fail the validation check.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsilverstripe/framework≥ 3.0.0&&< 3.0.143.0.14composer require silverstripe/framework:^3.0.14
🐘Packagistsilverstripe/framework≥ 3.1.0&&< 3.1.133.1.13composer require silverstripe/framework:^3.1.13

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update silverstripe/framework to 3.0.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-g4hp-pfvf-vm5w is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

When a secure token parameter is provided to a SilverStripe site (such as isDev or flush) an empty token parameter can be provided in order to bypass normal authentication parameters. For instance, http://www.mysite.com/?isDev=1&isDevtoken will force a site to dev mode. Alternatively, "flush" could also be used in succession to cause excessive load on a victim site and risk denial of service. The fix in this case is to ensure that empty tokens fail the validation check.
O3 Security · Impact-Aware SCA

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SilverStripe Vulnerability on 'isDev', 'isTest' and 'flush'…