CVE-2023-6809: The Custom fields shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's

Routine

MEDIUM 6.4DOWNGRADE

CVE-2023-6809 is a medium-severity flaw (CVSS 6.4) affecting custom fields shortcode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Custom fields shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's cf shortcode in all versions up to, and including, 0.1 due to insufficient input sanitization and output escaping on user supplied custom post meta values. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-03-13
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: gonahkar

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

Am I affected?

Timeline

2024-03-13 16:15 UTCPublished CVE record published
2026-06-17 06:51 UTCUpdated Record last modified

gonahkar custom fields shortcode DOWNGRADE

Affected: 0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.1

1. Check installed version

apt-cache policy custom-fields-shortcode || rpm -q custom-fields-shortcode || custom-fields-shortcode --version

2. No fixed release: DOWNGRADE to a release before 0.1 (Debian / Ubuntu)

apt-cache madison custom-fields-shortcode sudo apt install custom-fields-shortcode=<VERSION_BEFORE_0.1> sudo apt-mark hold custom-fields-shortcode

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list custom-fields-shortcode sudo dnf downgrade custom-fields-shortcode-<VERSION_BEFORE_0.1> sudo dnf versionlock add custom-fields-shortcode

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-6809?

custom fields shortcode: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-6809 being exploited?

CVE-2023-6809 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-2023-6809 affect?

CVE-2023-6809 affects custom fields shortcode. Severity is medium (CVSS 6.4). The Custom fields shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's cf shortcode in all versions up to, and including, 0.1 due to insufficient input sanitization and output escaping on user supplie

How urgent is CVE-2023-6809?

Priority 31/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

References

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