CVE-2026-22216Network attack vector

Unwanted email subscriptions via unthrottled wildcard requests

Published Mar 13, 2026 · Updated Mar 13, 2026

Missing rate limiting in wpDiscuz before 7.6.47 allows remote attackers to subscribe arbitrary email addresses to post notifications. The wpdAddSubscription handler accepts repeated unauthenticated POST requests and evaluates supplied addresses with SQL LIKE wildcard matching. No account or user interaction is required, and repeated requests generate unwanted notification email for victim addresses.

CVSS severity6.9
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing rate limiting in wpDiscuz before 7.6.47 allows remote attackers to subscribe arbitrary email addresses to post notifications. The wpdAddSubscription handler accepts repeated unauthenticated POST requests and evaluates supplied addresses with SQL LIKE wildcard matching. No account or user interaction is required, and repeated requests generate unwanted notification email for victim addresses.

The record

CVE
CVE-2026-22216
Published
Mar 13, 2026
Updated
Mar 13, 2026
Vendor
AdvancedCoding
Product
wpDiscuz
Classifications
CWE-799
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.6.47

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AdvancedCoding · wpDiscuzversion=0 <7.6.47

Published CVSS scores

6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-799Improper Control of Interaction Frequency

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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