How severe is CVE-2023-6526?

CVE-2023-6526 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-6526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6526?

CVE-2023-6526 affects Metabox Meta Box. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-6526?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-6526 have an EU (EUVD) identifier?

Yes. CVE-2023-6526 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58757.

When was CVE-2023-6526 published?

CVE-2023-6526 was published on 2024-02-05 and last updated on 2026-06-17.

CVE-2023-6526

CVE-2023-6526 is a medium-severity vulnerability in Metabox Meta Box with a CVSS 3.x base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-58757
Weakness: CWE-79
Affected product: Metabox Meta Box
Published: 2024-02-05
Last modified: 2026-06-17

Description

The Meta Box – WordPress Custom Fields Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom post meta values displayed through the plugin's shortcode in all versions up to, and including, 5.9.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Frequently asked questions

What is CVE-2023-6526?: The Meta Box – WordPress Custom Fields Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom post meta values displayed through the plugin's shortcode in all versions up to, and including, 5.9.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
How severe is CVE-2023-6526?: CVE-2023-6526 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-6526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6526?: CVE-2023-6526 affects Metabox Meta Box. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-6526?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-6526 have an EU (EUVD) identifier?: Yes. CVE-2023-6526 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58757.
When was CVE-2023-6526 published?: CVE-2023-6526 was published on 2024-02-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:metabox:meta_box:*:*:*:*:*:wordpress:*:*

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