WordPress plugin vulnerabilities: week 37, 2021
5 vulnerabilities published Sep 13 – Sep 19, 2021 in 5 plugins we track, by day.
1 high 4 medium
Dates are when the CVE record was published (UTC). Versions and fixes reflect our data as of 2026-11-04, so a fix may have shipped since.
“Affected” is the version range the source gives. “Fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version. Each CVE id links to the full record on the plugin’s page.
Friday, September 17, 2021 · 1
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medium 5.3 BulletProof Security
Monday, September 13, 2021 · 4
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high 8.8 Paid Membership Subscriptions
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medium 5.4 Timetable and Event Schedule by MotoPress
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medium 4.8 WP Courses LMS
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medium 6.1 Smash Balloon Social Post Feed
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Browse vulnerabilities
Common types: Cross-site scripting (XSS) · Missing authorization · Cross-site request forgery (CSRF) · SQL injection · Sensitive data exposure · PHP object injection · Privilege escalation · Remote code execution
Where this data comes from
- Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Plugin versions, update dates and install counts: the wordpress.org Plugins API.
- These lists cover the 3,948 plugins in our catalogue, not every plugin on wordpress.org. We only list a CVE for a plugin when its references or its advisory name that exact plugin, so a few real issues may be missing. Spot an error? Email Daniel.