CORS bypass via unchecked page-origin messages
Published May 14, 2024 · Updated Aug 2, 2024
Origin validation failure in Hoppscotch Browser Extension before 0.35 allows remote attackers to bypass browser CORS restrictions. The content-script message handler accepts window messages without checking the page origin against the configured origin list, processes extension API requests, and returns their results. An affected extension must be installed and active while an attacker-controlled site runs in the browser, enabling that site to make otherwise blocked cross-origin requests and read returned data.
Summary
What happened
Origin validation failure in Hoppscotch Browser Extension before 0.35 allows remote attackers to bypass browser CORS restrictions. The content-script message handler accepts window messages without checking the page origin against the configured origin list, processes extension API requests, and returns their results. An affected extension must be installed and active while an attacker-controlled site runs in the browser, enabling that site to make otherwise blocked cross-origin requests and read returned data.
The record
- CVE
- CVE-2024-34714
- Published
- May 14, 2024
- Updated
- Aug 2, 2024
- Vendor
- Hoppscotch
- Product
- Hoppscotch Browser Extension
- Classifications
- CWE-354, T1189
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- May 14, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <0.28
- Affected versionversion=>= 0.28, < 0.35
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Hoppscotch origin-list bypass demonstration siteproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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