WordPress plugin vulnerabilities: week 34, 2021
5 vulnerabilities published Aug 23 – Aug 29, 2021 in 5 plugins we track, by day.
5 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.
Monday, August 23, 2021 · 5
-
medium 5.4 HD Quiz
-
medium 5.4 WSMS (formerly WP SMS)
-
medium 4.8 GiveWP
-
medium 4.8 Maintenance
-
medium 5.4 Simple Social Media Share Buttons
Ran a vulnerable version? Check your site for signs of a hack
The free scan reads the public side of your site and looks for spam pages, hidden redirects, injected scripts and blacklist entries. No login, no install, about a minute.
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.