Vulnerability in Gvectors Wpdiscuz
CVE-2026-22216
wpDiscuz before 7.6.47 contains a missing rate limiting vulnerability that allows unauthenticated attackers to subscribe arbitrary email addresses to post notifications by sending POST requests to the wpdAddSubscription handler in class.WpdiscuzHelperAjax.php. Attackers can exploit LIKE wildcard characters in the subscription query to match multiple email addresses and generate unwanted notification emails to victim accounts.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (24.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Gvectors Wpdiscuz — versions 0, 7.6.47
Weakness classification (CWE)
References
- wordpress.org/plugins/wpdiscuz/ (Product, Release Notes, patch)
- wordpress.org/plugins/wpdiscuz/ (Product, product)
- www.vulncheck.com/advisories/wpdiscuz-before-no-rate-limiting-on-subscription-e… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-22216?
- CVE-2026-22216 is a medium-severity vulnerability in Gvectors Wpdiscuz, classified under CWE-799. CVSS score: 6.5/10. Published 2026-03-13.
- How severe is CVE-2026-22216?
- Medium severity. CVSS v3 base score is 6.5 out of 10.