Known vulnerabilities in JSM Show Post Metadata

Show post metadata (aka custom fields) in a metabox when editing posts / pages - a great tool for debugging issues with post metadata.

2Reported vulnerabilities

6.4Highest CVSS score

4.9.0Latest version

10,000+Active installs

What to do now

Update JSM Show Post Metadata to 4.9.1 or later. 2 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 13, 2026 / Tested up to WordPress: 7.1 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2026-88997	Medium 6.4	0.3%	4.9.0 and earlier	`4.9.1`	September 21, 2026
CVE-2025-24589	Medium 4.3	0.4%	4.6.0 and earlier	`4.6.1`	January 24, 2025

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.