CVE-2022-4666: The Markup (JSON-LD) structured in schema.org WordPress plugin through 4.8.1 does not validate and escape some

Q: How do I fix CVE-2022-4666?

markup \(json-ld\) structured in schema.org: upgrade to newer than 4.8.1. Exact commands for each OS are on this page.

Q: Is CVE-2022-4666 being exploited?

CVE-2022-4666 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-2022-4666 affect?

CVE-2022-4666 affects markup \(json-ld\) structured in schema.org. Severity is medium (CVSS 5.4). The Markup (JSON-LD) structured in schema.org WordPress plugin through 4.8.1 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

Q: How urgent is CVE-2022-4666?

Priority 34/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2022-4666 is a medium-severity flaw (CVSS 5.4) affecting markup \(json-ld\) structured in schema.org. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Markup (JSON-LD) structured in schema.org WordPress plugin through 4.8.1 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	0.5% (top 59%)
CISA exploited list	No
Published	2023-02-21
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: terakoya

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

Am I affected?

Timeline

2023-02-21 09:15 UTCPublished CVE record published
2026-06-17 05:21 UTCUpdated Record last modified

terakoya markup \(json-ld\) structured in schema.org UPGRADE

Affected: <= 4.8.1

Fixed in: newer than 4.8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy markup-json-ld-structured-in-schema.org || rpm -q markup-json-ld-structured-in-schema.org || markup-json-ld-structured-in-schema.org --version

2. UPGRADE to newer than 4.8.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade markup-json-ld-structured-in-schema.org

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade markup-json-ld-structured-in-schema.org

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-2022-4666?

markup \(json-ld\) structured in schema.org: upgrade to newer than 4.8.1. Exact commands for each OS are on this page.

Is CVE-2022-4666 being exploited?

CVE-2022-4666 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-2022-4666 affect?

CVE-2022-4666 affects markup \(json-ld\) structured in schema.org. Severity is medium (CVSS 5.4). The Markup (JSON-LD) structured in schema.org WordPress plugin through 4.8.1 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

How urgent is CVE-2022-4666?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

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