Cross-Site Scripting in JSM Show Post Metadata Plugin for WordPress
CVE-2026-88997

Currently unrated

Key Information:

Vendor

WordPress
Status
Jsm Show Post Metadata
Vendor
CVE Published:
23 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-88997?

The JSM Show Post Metadata plugin for WordPress prior to version 4.9.1 is susceptible to a cross-site scripting (XSS) vulnerability. This flaw arises from the failure to properly escape post meta keys before outputting them within inline event-handler attributes in admin-facing meta boxes. As a result, users with contributor-level access and above can exploit this vulnerability to inject arbitrary JavaScript code. This malicious script executes in the sessions of higher-privileged users who review the affected posts, potentially compromising sensitive information and actions within the WordPress admin area.

Affected Version(s)

JSM Show Post Metadata 0 < 4.9.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-88997 - Proof of Concept

References

https://wpscan.com/vulnerability/1699d3aa-29ca-4197-8e3b-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

pervinzahidli
WPScan
.