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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://wordpress.org/plugins/wpdiscuz/	Product
https://wordpress.org/plugins/wpdiscuz/#developers	Product Release Notes
https://www.vulncheck.com/advisories/wpdiscuz-before-no-rate-limiting-on-subscription-endpoints-with-like-wildcard-bypass	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gvectors:wpdiscuz:*:*:*:*:*:wordpress:*:*

History

17 Mar 2026, 11:43

Type	Values Removed	Values Added
References	~~() https://wordpress.org/plugins/wpdiscuz/ -~~	() https://wordpress.org/plugins/wpdiscuz/ - Product
References	~~() https://wordpress.org/plugins/wpdiscuz/#developers -~~	() https://wordpress.org/plugins/wpdiscuz/#developers - Product, Release Notes
References	~~() https://www.vulncheck.com/advisories/wpdiscuz-before-no-rate-limiting-on-subscription-endpoints-with-like-wildcard-bypass -~~	() https://www.vulncheck.com/advisories/wpdiscuz-before-no-rate-limiting-on-subscription-endpoints-with-like-wildcard-bypass - Third Party Advisory
CPE		cpe:2.3:a:gvectors:wpdiscuz::::::wordpress::*
First Time		Gvectors Gvectors wpdiscuz

13 Mar 2026, 19:54

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-13 19:54

Updated : 2026-03-17 11:43

NVD link : CVE-2026-22216

Mitre link : CVE-2026-22216

CVE.ORG link : CVE-2026-22216

JSON object : View

Products Affected

gvectors

wpdiscuz

CWE

CWE-799

Improper Control of Interaction Frequency

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