WordPress Zero Spam Plugin <= 5.4.4 is vulnerable to SQL Injection

published 2023-11-03 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-36389

cvss: 7.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Highfivery LLC Zero Spam for WordPress allows SQL Injection.This issue affects Zero Spam for WordPress: from n/a through 5.4.4.

Patch / fix

fixed in 1

Highfivery LLC Zero Spam for WordPress 5.4.5

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 20 mo ago (2025-02-19)

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.6	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L
CISA ADP	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Highfivery LLC Zero Spam for WordPress

Classification

Weakness

CWE-89 Improper Neutralization of Special Elements used in an SQL Command

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/vulnerability/zero-spam/wordpress-zero-spam-for-wordpress-plugin-5-4-4-sql-injection-vulnerability?_
vdb-entry, third-party-advisory

Sources

CVE List CVE-2023-32121
NVD CVE-2023-32121

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