Description
The PayPal merchant SDK does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
References (5)
Core 5
Core References
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/56445
Third Party Advisory, VDB Entry vdb-entry
x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/79913
Exploit x_refsource_misc
http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf
Third Party Advisory third-party-advisory
x_refsource_secunia
http://secunia.com/advisories/51184
Patch x_refsource_confirm
https://github.com/paypal/SDKs/commit/5f2d6dd77fb4211dcde34e36f1864234526c5d64
Scores
EPSS
0.0091
EPSS Percentile
55.8%
Details
CWE
CWE-20
Status
published
Products (1)
paypal/merchant_sdk
Published
Nov 04, 2012
Tracked Since
Feb 18, 2026