Description
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.
References (3)
Core 3
Core References
Product patch
https://wordpress.org/plugins/wpdiscuz/#developers
Product product
https://wordpress.org/plugins/wpdiscuz/
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/wpdiscuz-before-no-rate-limiting-on-subscription-endpoints-with-like-wildcard-bypass
Scores
CVSS v3
6.5
EPSS
0.0032
EPSS Percentile
23.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-799
Status
published
Products (3)
gVectors/wpDiscuz
< 7.6.47
gvectors/wpdiscuz
< 7.6.47
gVectors/wpDiscuz
7.6.47
Published
Mar 13, 2026
Tracked Since
Mar 14, 2026