CVE-2026-12108

mediumCVSS 4.4covered by 1 sourcefirst seen 2026-07-10

The Highlighting Code Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.2.0 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. This only affects multi-site installations and installations where unfiltered_html has been disabled.

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Exploitation outlook

Low exploitation risk0.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-12108: The Highlighting Code Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting …nvd · 2026-07-10

External references

NVD record for CVE-2026-12108

CVE.org record

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