CVE-2026-65516

PeproDev Ultimate Invoice <= 2.2.6 - Unauthenticated Server-Side Request Forgery

2026-07-23 00:00
longnv719

Strategic Overview

Status
Unpatched
Affected Plugin
PeproDev Ultimate Invoice
Affected Version
<= 2.2.6
CVSS
7.2High
Weakness type
CWE-918 · Server-Side Request Forgery (SSRF)
CVE
CVE-2026-65516
View all PeproDev Ultimate Invoice vulnerabilities

At a glance

CVE-2026-65516 is a high-severity Server-Side Request Forgery (SSRF) vulnerability in the PeproDev Ultimate Invoice WordPress plugin, affecting versions <= 2.2.6. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed July 2026, reported by longnv719.

Vulnerability Overview

The PeproDev Ultimate Invoice plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.2.6. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application which can be used to query and modify information from internal services.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-918: Server-Side Request Forgery (SSRF)

Reaching this weakness in PeproDev Ultimate Invoice <= 2.2.6 takes no account at all. Server-side request forgery means the application fetches a URL supplied by the caller, turning the server into a proxy for requests the attacker could not make directly.

The request originates from inside the hosting network, which is how these flaws reach cloud metadata endpoints, internal admin panels and services that trust local traffic. No fixed build of this plugin is recorded for PeproDev Ultimate Invoice yet, so installs running <= 2.2.6 stay exposed until the vendor ships one.

Remediation

No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-65516https://www.wordfence.com/threat-intel/vulnerabilities/id/ec2276d6-431f-428c-b1d1-3acbd60e0505https://nvd.nist.gov/vuln/detail/CVE-2026-65516

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C