How severe is CVE-2017-6099?

CVE-2017-6099 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-6099 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-6099?

CVE-2017-6099 affects Paypal Merchant-sdk-php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-6099?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-6099 published?

CVE-2017-6099 was published on 2017-02-24 and last updated on 2026-06-17.

CVE-2017-6099

CVE-2017-6099 is a medium-severity vulnerability in Paypal Merchant-sdk-php with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Paypal Merchant-sdk-php
Published: 2017-02-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2017-6099?: CVE-2017-6099 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-6099 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-6099?: CVE-2017-6099 affects Paypal Merchant-sdk-php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-6099?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-6099 published?: CVE-2017-6099 was published on 2017-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:paypal:merchant-sdk-php:3.9.1:*:*:*:*:*:*:*

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