CPO Companion <= 1.0.4 - Authenticated (Administrator+) Stored Cross-Site Scripting

published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-12252

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

The CPO Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several of its content type settings parameters in versions up to, and including, 1.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Patch / fix

links 2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-13)

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.5	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

wpchill CPO Companion

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&new=2844012%40cpo-companion%2Ftrunk&old=2574013%40cpo-companion%2Ft
patch, third-party-advisory
wordfence.com /threat-intel/vulnerabilities/id/9195ac7e-2995-44d0-b5c6-8ffb47395f24
patch, third-party-advisory
wordfence.com /threat-intel/vulnerabilities/id/9195ac7e-2995-44d0-b5c6-8ffb47395f24?source=cve

Sources

CVE List CVE-2023-0162
NVD CVE-2023-0162

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