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Not in CISA KEV
HIGH severity

CVE-2020-35239 — cakephp

HIGH

CVE-2020-35239 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in cakephp/cakephp. A fix is available for cakephp/cakephp — see the affected versions and patch details below.

CakePHP allows method override parameters to bypass CSRF checks

Also known asGHSA-9pgx-pf36-w46r
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.37%0.74%1.11%0.2%0.6%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
🐘cakephp/cakephp🐘cakephp/cakephp

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

A vulnerability exists in CakePHP versions 4.0.x through 4.1.3. The CsrfProtectionMiddleware component allows method override parameters to bypass CSRF checks by changing the HTTP request method to an arbitrary string that is not in the list of request methods that CakePHP checks. Additionally, the route middleware does not verify that this overriden method (which can be an arbitrary string) is actually an HTTP method.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistcakephp/cakephp≥ 4.0.0&&< 4.0.104.0.10composer require cakephp/cakephp:^4.0.10
🐘Packagistcakephp/cakephp≥ 4.1.0&&< 4.1.44.1.4composer require cakephp/cakephp:^4.1.4

Affected Products

1 product · 1 configurations
Application
cakephpcakephp
≥ 4.0.0 && ≤ 4.1.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update cakephp/cakephp to 4.0.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-35239 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

A vulnerability exists in CakePHP versions 4.0.x through 4.1.3. The CsrfProtectionMiddleware component allows method override parameters to bypass CSRF checks by changing the HTTP request method to an arbitrary string that is not in the list of request methods that CakePHP checks. Additionally, the route middleware does not verify that this overriden method (which can be an arbitrary string) is actually an HTTP method.
O3 Security · Impact-Aware SCA

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CVE-2020-35239: cakephp CSRF — Fixed in 4.0.10