Echo: CSRF Protection Bypass via MethodOverride Rewriting POST to Safe Method
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.16.0, 5.4.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Echo, a Go web framework, has a flaw in its MethodOverride middleware that can cause CSRF protection to be skipped for state-changing POST requests when the middleware is registered before CSRF. As a result, an attacker could potentially make an authenticated victim's browser perform unintended actions on the affected application, though this requires a specific override configuration.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Echo's MethodOverride middleware accepts a safe HTTP method as the override target for a POST request. When MethodOverride is registered before CSRF in the post-routing middleware chain, route selection retains the original state-changing POST handler but the override changes the method before CSRF evaluates it, causing both token validation and Sec-Fetch-Site checks to be skipped. A cross-site exploit requires an authenticated victim and an override value that a browser-submitted request can control, such as the form getter used by the advisory reproducer; the default X-HTTP-Method-Override header getter is not settable by a cross-site form. This issue is fixed in 4.16.0 and 5.4.0.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- labstack echo
fixed in 4.16.0; From 5.0.0 · fixed in 5.4.0
- github.com/labstack/echo/v5Go
From 5.0.0 · fixed in 5.4.0
- github.com/labstack/echo/v4Go
fixed in 4.16.0