CVE-2019-20455: Gateways/Gateway.php in Heartland & Global Payments PHP SDK before 2.0.0 does not enforce SSL certificate vali

Q: How do I fix CVE-2019-20455?

php sdk: upgrade to 2.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2019-20455 being exploited?

CVE-2019-20455 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-20455 affect?

CVE-2019-20455 affects php sdk. Severity is medium (CVSS 5.9). Gateways/Gateway.php in Heartland & Global Payments PHP SDK before 2.0.0 does not enforce SSL certificate validations.

Q: How urgent is CVE-2019-20455?

Priority 46/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.9REMOTEUPGRADE

CVE-2019-20455 is a medium-severity flaw (CVSS 5.9) affecting php sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Gateways/Gateway.php in Heartland & Global Payments PHP SDK before 2.0.0 does not enforce SSL certificate validations.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-295
Published	2020-02-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: globalpayments

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-02-14 16:15 UTCPublished CVE record published
2026-06-17 02:30 UTCUpdated Record last modified

globalpayments php sdk UPGRADE

Affected: < 2.0.0

Fixed in: 2.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy php-sdk || rpm -q php-sdk || php-sdk --version

2. UPGRADE to 2.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade php-sdk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade php-sdk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-20455?

php sdk: upgrade to 2.0.0. Exact commands for each OS are on this page.

Is CVE-2019-20455 being exploited?

CVE-2019-20455 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-20455 affect?

CVE-2019-20455 affects php sdk. Severity is medium (CVSS 5.9). Gateways/Gateway.php in Heartland & Global Payments PHP SDK before 2.0.0 does not enforce SSL certificate validations.

How urgent is CVE-2019-20455?

Priority 46/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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