CVE-2018-5212: The Simple Download Monitor plugin before 3.5.4 for WordPress has XSS via the sdm_upload_thumbnail (aka File Thumbnail) parameter in an edit action to wp-admin/post.php.

medium Affects simple-download-monitor (WordPress plugin). Feed 2026.10.28.3, updated 2026-10-28; published 2018-01-04; advisory modified 2026-06-17.

The Simple Download Monitor plugin before 3.5.4 for WordPress has XSS via the sdm_upload_thumbnail (aka File Thumbnail) parameter in an edit action to wp-admin/post.php.

Package: simple-download-monitor (WordPress plugin) WordPress
Affected versions: =3.5.4
Fixed in: no fix recorded
Severity: medium CVSS 5.4
Exploitation: not on CISA KEV · EPSS 1% (63.3th percentile)
Published: 2018-01-04
Source: nvd

References

CWE-79

NVD record simple-download-monitor (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs How findings are ranked

Related advisories

CVE-2021-24695 high The Simple Download Monitor WordPress plugin before 3.9.6 saves logs in a predictable loca same package: simple-download-monitor (WordPress plugin)
CVE-2021-24692 medium The Simple Download Monitor WordPress plugin before 3.9.5 allows users with a role as low same package: simple-download-monitor (WordPress plugin)
CVE-2021-24693 critical The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the "File Thumbn same package: simple-download-monitor (WordPress plugin)
CVE-2018-5213 medium The Simple Download Monitor plugin before 3.5.4 for WordPress has XSS via the sdm_upload ( same package: simple-download-monitor (WordPress plugin)
CVE-2021-24697 medium The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the 1) sdm_activ same package: simple-download-monitor (WordPress plugin)
CVE-2021-24698 medium The Simple Download Monitor WordPress plugin before 3.9.6 allows users with a role as low same package: simple-download-monitor (WordPress plugin)