PayPal PHP Merchant SDK Cross-site scripting (XSS) vulnerability

MEDIUM 6.1CVE-2017-6099 · GHSA-p4g7-wjhq-9r2h · Published 24/02/2017 · updated 17/06/2026

In short

CVE-2017-6099 is a MEDIUM (CVSS 6.1) vulnerability affecting paypal/merchant-sdk-php, merchant-sdk-php (paypal).
Chance of exploitation in the next 30 days (EPSS): 1.2%, higher than 69.3% of all vulnerabilities.
Fix: update to 3.12.0 or later.

Package	Affected versions	Patched versions
paypal/merchant-sdk-php Packagist	`≥ 3.0.0, < 3.12.0`	`3.12.0`
merchant-sdk-php paypal	`= 3.9.1`	No fix yet

Description

Cross-site scripting (XSS) vulnerability in GetAuthDetails.html.php in PayPal PHP Merchant SDK (aka merchant-sdk-php) 3.9.1 allows remote attackers to inject arbitrary web script or HTML via the token parameter.

NVD description

References

nvd.nist.gov/vuln/detail/CVE-2017-6099 · ADVISORY
paypal/merchant-sdk-php · WEB
FriendsOfPHP/security-advisories · WEB
securityfocus.com/bid/96432 · WEB

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