What is CVE-2017-6099?

CVE-2017-6099 is a medium-severity vulnerability in Paypal Merchant-Sdk-Php, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-02-24.

How severe is CVE-2017-6099?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Paypal Merchant-Sdk-Php

CVE-2017-6099

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-02-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.012 (68.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Paypal Merchant-Sdk-Php — versions 3.9.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/bid/96432 (VDB Entry, Third Party Advisory, vdb-entry)
github.com/paypal/merchant-sdk-php/issues/129 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-6099?: CVE-2017-6099 is a medium-severity vulnerability in Paypal Merchant-Sdk-Php, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-02-24.
How severe is CVE-2017-6099?: Medium severity. CVSS v3 base score is 6.1 out of 10.