CVE-2023-3998Network attack vector

Unauthenticated post-rating modification via unchecked userRate

Published Oct 20, 2023 · Updated Apr 8, 2026

Authorization bypass in AdvancedCoding wpDiscuz 7.6.3 and earlier allows remote attackers to alter post ratings through an AJAX request. The userRate function performs the requested rating update without verifying that the unauthenticated caller is authorized for the targeted post. Any network visitor who can reach the rating action can increase or decrease stored post-rating data, with no reported confidentiality or availability impact.

CVSS severity5.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in AdvancedCoding wpDiscuz 7.6.3 and earlier allows remote attackers to alter post ratings through an AJAX request. The userRate function performs the requested rating update without verifying that the unauthenticated caller is authorized for the targeted post. Any network visitor who can reach the rating action can increase or decrease stored post-rating data, with no reported confidentiality or availability impact.

The record

CVE
CVE-2023-3998
Published
Oct 20, 2023
Updated
Apr 8, 2026
Vendor
AdvancedCoding
Product
wpDiscuz
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=7.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AdvancedCoding · wpDiscuzversion=0 <=7.6.3

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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