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CVE-2019-20455

20
FAUCET Score

CVE-2019-20455 describes a vulnerability in the Heartland & Global Payments PHP SDK prior to version 2.0.0, where the Gateways/Gateway.php component fails to enforce SSL certificate validations. This medium-severity vulnerability (CVSS 5.9) has a high potential for impact on confidentiality, as an attacker could intercept sensitive data due to the lack of proper certificate validation, though the attack complexity is high. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.0CPE matchmatch criteria
cpe:2.3:a:globalpayments:php_sdk:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 17th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: globalpayments/php-sdkFixed in: 2.0.0
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-pm77-c4q7-3fwjmedium

Improper Certificate Validation in Heartland & Global Payments PHP SDK

Oct 12, 2021

References

github.com / globalpayments/php-sdk/compare/1.3.3...2.0.0
PatchRelease NotesThird Party Advisory
github.com / globalpayments/php-sdk/pull/8
ExploitThird Party Advisory
github.com / globalpayments/php-sdk/releases/tag/2.0.0
Release NotesThird Party Advisory
winterdragon.ca / global-payments-vulnerability
ExploitPatchThird Party AdvisoryURL Repurposed