browserless versions 1.44.0 through 2.56.7 fail to enforce file protocol restrictions in Playwright websocket endpoints, allowing authenticated token holders to read arbitrary files. Attackers can navigate Playwright-driven browsers to file scheme URLs and access files accessible to the container process despite the ALLOW_FILE_PROTOCOL setting defaulting to false.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/browserless/browserless
disclosure@vulncheck.com
https://github.com/browserless/browserless/blob/v2.50.1/src/browsers/browsers.c…
disclosure@vulncheck.com
https://github.com/browserless/browserless/blob/v2.50.1/src/browsers/browsers.p…
disclosure@vulncheck.com
https://github.com/geo-chen/oss/blob/main/browserless.md
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/browserless-1.44.0-through-2.56.7-file-pro…
disclosure@vulncheck.com