wpDiscuz <= 7.6.3 - Insecure Direct Object Reference to Post Rating Increase/Decrease

published 2023-10-20 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-44621

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

The wpDiscuz plugin for WordPress is vulnerable to unauthorized modification of data due to a missing authorization check on the userRate function in versions up to, and including, 7.6.3. This makes it possible for unauthenticated attackers to increase or decrease the rating of a post.

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 21 mo ago (2025-02-05)

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

advancedcoding Comments – wpDiscuz

Classification

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key
CWE-862 Missing Authorization

Technology feeds

WordPress rss critical rss

References

wordfence.com /threat-intel/vulnerabilities/id/9d09bdab-ffab-44cc-bba2-821b21a8e343?source=cve
third-party-advisory
plugins.trac.wordpress.org /browser/wpdiscuz/trunk/utils/class.WpdiscuzHelperAjax.php#L886
third-party-advisory

Sources

CVE List CVE-2023-3998
NVD CVE-2023-3998

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary