CVE-2023-0542: The Custom Post Type List Shortcode WordPress plugin through 1.4.4 does not validate and escape some of its sh

Q: How do I fix CVE-2023-0542?

custom post type list shortcode: upgrade to newer than 1.4.4. Exact commands for each OS are on this page.

Q: Is CVE-2023-0542 being exploited?

CVE-2023-0542 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-0542 affect?

CVE-2023-0542 affects custom post type list shortcode. Severity is medium (CVSS 5.4). The Custom Post Type List Shortcode WordPress plugin through 1.4.4 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contr

Q: How urgent is CVE-2023-0542?

Priority 34/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2023-0542 is a medium-severity flaw (CVSS 5.4) affecting custom post type list shortcode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Custom Post Type List Shortcode WordPress plugin through 1.4.4 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-05-08
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: blackbirdi

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-08 14:15 UTCPublished CVE record published
2026-06-17 05:25 UTCUpdated Record last modified

blackbirdi custom post type list shortcode UPGRADE

Affected: <= 1.4.4

Fixed in: newer than 1.4.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy custom-post-type-list-shortcode || rpm -q custom-post-type-list-shortcode || custom-post-type-list-shortcode --version

2. UPGRADE to newer than 1.4.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade custom-post-type-list-shortcode

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade custom-post-type-list-shortcode

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-0542?

custom post type list shortcode: upgrade to newer than 1.4.4. Exact commands for each OS are on this page.

Is CVE-2023-0542 being exploited?

CVE-2023-0542 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-0542 affect?

CVE-2023-0542 affects custom post type list shortcode. Severity is medium (CVSS 5.4). The Custom Post Type List Shortcode WordPress plugin through 1.4.4 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contr

How urgent is CVE-2023-0542?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

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