CVE-2026-2383: Simple Download Monitor <= 4.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom Field

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-27 · updated 2026-06-17
Weakness: CWE-79

Description

The Simple Download Monitor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom field in all versions up to, and including, 4.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

Simple Download Monitor: through 4.0.5

References

https://plugins.trac.wordpress.org/browser/simple-download-monitor/tags/4.0.3/sdm-shortcodes.php#L543
https://plugins.trac.wordpress.org/browser/simple-download-monitor/trunk/sdm-shortcodes.php#L543
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3464024%40simple-download-monitor%2Ftrunk&old=3430786%40simple-download-monitor%2Ftrunk&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/556e41d1-2c98-4175-87ba-29689704c2f0?source=cve

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