TI-2026-32495 Aliases CVE-2026-44583 GHSA-7wwh-xcc3-9fcg

Paymenter: Blind Unauthenticated SSRF on the Paypal gateway module

LOW 30CWE-918Published 2026-07-20 · Updated 2026-07-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

Paymenter is a free and open-source webshop solution for management of hosting services. In versions prior to 1.5.0, the PayPal webhook endpoint /extensions/paypal/webhook processes the PAYPAL-CERT-URL HTTP header without validation, allowing attackers to control server-side HTTP request destinations. This value is passed directly into a server-side HTTP request via file_get_contents, allowing attackers to control the destination of the request. No allowlist, validation, or signature verification is applied to the header before usage. As a result, the application can be coerced into performing HTTP requests to attacker-controlled or internal network destinations. This vulnerability allows remote unauthenticated attackers to induce server-side HTTP GET requests to arbitrary external or internal endpoints. Depending on network configuration, this may lead to: blind SSRF to external attacker-controlled systems, and potential access to internal network services No direct response data is returned to the attacker (blind SSRF), but the issue may still enable sensitive network probing or data exfiltration via side channels. This issue has been fixed in version 1.5.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00415 36th percentileScored 2026-11-07

Fix Fixed Paymenter (Paymenter): 1.5.0paymenter/paymenter (Packagist): 1.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Paymenter	Paymenter	before 1.5.0	1.5.0	Patch available	CNA
—	paymenter/paymenter (Packagist)	before 1.5.0	1.5.0	Patch available	GHSA-7wwh-xcc3-9fcg

Paymenter VendorPaymenter Affected before 1.5.0 Fixed in 1.5.0 Patch available CNA
paymenter/paymenter (Packagist) Vendor— Affected before 1.5.0 Fixed in 1.5.0 Patch available GHSA-7wwh-xcc3-9fcg

Remediation

Fix · CNA Paymenter (Paymenter) Fixed in 1.5.0
Fix · GHSA-7wwh-xcc3-9fcg paymenter/paymenter (Packagist) Fixed in 1.5.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-44583
2026-10-03 Alias added: GHSA-7wwh-xcc3-9fcg

References

Other 2

TI-2025-35891 Paymenter Vulnerable to Remote Code Execution via Public File Uploads CVSS 3.1CRITICAL 10.0
TI-2026-34786 Paymenter: URL parameter injection bypasses paid plan limits at checkout CVSS 3.1HIGH 8.5
TI-2026-50118 Paymenter: Credit-refund double-spend race condition in service downgrade (doUpgrade) CVSS 3.1MEDIUM 6.5
TI-2026-32497 Paymenter: Broken object level authorization via service reference manipulation on ticket creation CVSS 3.1MEDIUM 5.4
TI-2026-39897 Paymenter: Race condition in payWithCredit() enables credit double-spend CVSS 3.1MEDIUM 5.3
TI-2026-32496 Paymenter doesn't reset email verification status after email change CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences