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.
CVE-2026-12108
Score 4.4 from GitHub Security Advisory published 2026-07-10. a secondary CVSS source baseline 4.4; sources differ by 0.0.
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.4
- EG Score
- 4.4(medium)
- EG Risk
- 20(Track)EG Risk 20/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity44% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 26%
- KEV
- Not listed
Published
July 10, 2026
Last Modified
July 10, 2026
References (8)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/highlighting-code-block/tags/2.1.3/class/loos_hcb.php#L158
- security@wordfencehttps://plugins.trac.wordpress.org/browser/highlighting-code-block/tags/2.1.3/class/loos_hcb_menu.php#L23
- security@wordfencehttps://plugins.trac.wordpress.org/browser/highlighting-code-block/tags/2.1.3/class/loos_hcb_scripts.php#L69
- security@wordfencehttps://plugins.trac.wordpress.org/browser/highlighting-code-block/tags/2.2.0/class/loos_hcb.php#L158
- security@wordfencehttps://plugins.trac.wordpress.org/browser/highlighting-code-block/tags/2.2.0/class/loos_hcb_menu.php#L23
- security@wordfencehttps://plugins.trac.wordpress.org/browser/highlighting-code-block/tags/2.2.0/class/loos_hcb_scripts.php#L69
- security@wordfencehttps://plugins.trac.wordpress.org/changeset?reponame=&old=3592103%40highlighting-code-block&new=3592103%40highlighting-code-block
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/166e1d3a-3fd9-4ab0-ba0d-707c6d59e0cd?source=cve
Vendor Advisories for CVE-2026-12108(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 16× in last 7d / 80× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 123 total refreshes for this CVE.
- 2026-08-30 06:32 UTCEG score recompute
- 2026-08-30 06:32 UTCGHSA enrichment
- 2026-08-30 01:21 UTCEPSS rescore
- 2026-08-28 21:40 UTCEPSS rescore
- 2026-08-27 23:56 UTCEG score recompute
- 2026-08-27 23:56 UTCGHSA enrichment
- 2026-08-27 14:24 UTCEPSS rescore
- 2026-08-27 01:51 UTCEG score recompute
- 2026-08-27 01:51 UTCGHSA enrichment
- 2026-08-26 03:43 UTCEG score recompute
- 2026-08-26 03:43 UTCGHSA enrichment
- 2026-08-25 13:48 UTCEPSS rescore
- 2026-08-24 20:17 UTCEG score recompute
- 2026-08-24 20:17 UTCGHSA enrichment
- 2026-08-23 18:10 UTCEG score recompute
- 2026-08-23 18:10 UTCGHSA enrichment
- 2026-08-23 00:19 UTCEPSS rescore
- 2026-08-22 20:04 UTCEG score recompute
- 2026-08-22 20:04 UTCGHSA enrichment
- 2026-08-21 23:48 UTCEPSS rescore
- 2026-08-21 21:58 UTCGHSA enrichment
- 2026-08-20 23:42 UTCEG score recompute
- 2026-08-20 23:42 UTCGHSA enrichment
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-20 01:36 UTCEG score recompute
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- 2026-08-20 01:36 UTCGHSA enrichment
- 2026-08-19 17:03 UTCEPSS rescore
- 2026-08-18 20:38 UTCEG score recompute
- 2026-08-18 20:37 UTCGHSA enrichment
- 2026-08-18 13:48 UTCEPSS rescore
- 2026-08-17 15:03 UTCEG score recompute
- 2026-08-17 15:03 UTCGHSA enrichment
- 2026-08-16 16:57 UTCEG score recompute
- 2026-08-16 16:57 UTCGHSA enrichment
- 2026-08-16 14:56 UTCEPSS rescore
- 2026-08-16 02:14 UTCEPSS rescore
- 2026-08-15 18:51 UTCEG score recompute
- 2026-08-15 18:51 UTCGHSA enrichment
- 2026-08-15 01:30 UTCEPSS rescore
- 2026-08-14 20:45 UTCGHSA enrichment
- 2026-08-13 22:39 UTCEG score recompute
- 2026-08-13 22:39 UTCGHSA enrichment
- 2026-08-13 22:00 UTCEPSS rescore
- 2026-08-13 00:33 UTCEG score recompute
- 2026-08-13 00:33 UTCGHSA enrichment
- 2026-08-12 13:50 UTCEPSS rescore
- 2026-08-12 02:27 UTCEG score recompute
- 2026-08-12 02:27 UTCGHSA enrichment
- 2026-08-11 13:42 UTCEPSS rescore
- 2026-08-11 04:21 UTCEG score recompute
- 2026-08-11 04:21 UTCGHSA enrichment
- 2026-08-10 23:59 UTCEPSS rescore
- 2026-08-10 06:15 UTCEG score recompute
- 2026-08-10 06:15 UTCGHSA enrichment
- 2026-08-09 13:46 UTCEPSS rescore
- 2026-08-09 08:10 UTCEG score recompute
- 2026-08-09 08:10 UTCGHSA enrichment
- 2026-08-08 16:37 UTCEPSS rescore
- 2026-08-08 10:04 UTCEG score recompute
- 2026-08-08 10:04 UTCGHSA enrichment
- 2026-08-07 11:58 UTCGHSA enrichment
- 2026-08-06 13:52 UTCEG score recompute
- 2026-08-06 13:52 UTCGHSA enrichment
- 2026-08-06 13:46 UTCEPSS rescore
- 2026-08-05 19:17 UTCEPSS rescore
- 2026-08-05 15:46 UTCGHSA enrichment
- 2026-08-04 17:25 UTCEG score recompute
- 2026-08-04 17:25 UTCGHSA enrichment
- 2026-08-04 15:09 UTCEPSS rescore
- 2026-08-04 10:38 UTCEPSS rescore
- 2026-08-03 19:17 UTCEG score recompute
- 2026-08-03 19:17 UTCGHSA enrichment
- 2026-08-03 10:35 UTCEPSS rescore
- 2026-08-02 21:12 UTCEG score recompute
- 2026-08-02 21:12 UTCGHSA enrichment
- 2026-08-02 02:26 UTCEPSS rescore
- 2026-08-01 23:06 UTCEG score recompute
- 2026-08-01 23:06 UTCGHSA enrichment
- 2026-08-01 04:15 UTCEPSS rescore
- 2026-08-01 01:00 UTCGHSA enrichment
- 2026-07-31 02:52 UTCEG score recompute
- 2026-07-31 02:52 UTCGHSA enrichment
- 2026-07-30 16:27 UTCEPSS rescore
- 2026-07-30 04:43 UTCEG score recompute
- 2026-07-30 04:43 UTCGHSA enrichment
- 2026-07-30 01:30 UTCEPSS rescore
- 2026-07-29 06:35 UTCEG score recompute
- 2026-07-29 06:35 UTCGHSA enrichment
- 2026-07-28 15:36 UTCEPSS rescore
- 2026-07-28 08:26 UTCEG score recompute
- 2026-07-28 08:26 UTCGHSA enrichment
- 2026-07-27 14:13 UTCEPSS rescore
- 2026-07-27 10:19 UTCEG score recompute
- 2026-07-27 10:19 UTCGHSA enrichment
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 12:13 UTCEG score recompute
- 2026-07-26 12:13 UTCGHSA enrichment
- 2026-07-25 14:17 UTCEPSS rescore
- 2026-07-24 14:17 UTCEPSS rescore
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-12108?
When was CVE-2026-12108 disclosed?
Is CVE-2026-12108 actively exploited?
What is the CVSS score of CVE-2026-12108?
How do I remediate CVE-2026-12108?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-12108
Is Your Infrastructure Affected by CVE-2026-12108?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.