CVE-2026-12108 json
Highlighting Code Block <= 2.2.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'font_family' Setting
published 2026-07-10 4 mo ago modified 2026-07-10 4 mo ago also EUVD-2026-42841
- cvss
- 4.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.4 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N |
Affected products
- looswebstudio Highlighting Code Block
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/166e1d3a-3fd9-4ab0-ba0d-707c6d59e0cd?source=cve
- plugins.trac.wordpress.org /browser/highlighting-code-block/tags/2.2.0/class/loos_hcb.php#L158
- plugins.trac.wordpress.org /browser/highlighting-code-block/tags/2.2.0/class/loos_hcb_menu.php#L23
- plugins.trac.wordpress.org /browser/highlighting-code-block/tags/2.2.0/class/loos_hcb_scripts.php#L69
- plugins.trac.wordpress.org /browser/highlighting-code-block/tags/2.1.3/class/loos_hcb.php#L158
- plugins.trac.wordpress.org /browser/highlighting-code-block/tags/2.1.3/class/loos_hcb_menu.php#L23
- plugins.trac.wordpress.org /browser/highlighting-code-block/tags/2.1.3/class/loos_hcb_scripts.php#L69
- plugins.trac.wordpress.org /changeset?reponame=&old=3592103%40highlighting-code-block&new=3592103%40highlighting-code-block
Sources
- CVE List CVE-2026-12108
- NVD CVE-2026-12108
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.