u5CMS through v12.8.8 is vulnerable to reflected XSS via the ‘thanks’ parameter in multiple form components
CVE-2026-14449
This medium-severity CVE scores 6.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- 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
- 6.4
- EG Score
- 6.4(medium)
- EPSS
- 18.6%
- KEV
- Not listed
Published
July 2, 2026
Last Modified
July 2, 2026
Advisory Details (1)
Auto-updated Jul 3, 2026u5cms-12.8.9
Patch available: u5cms/u5cms v12.8.9
https://github.com/u5cms/u5cms/releases/tag/v12.8.9Vendor Advisories for CVE-2026-14449(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 18× in last 7d / 18× 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.
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 14:55 UTCEG score recompute
- 2026-07-06 14:55 UTCGHSA enrichment
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-05 15:27 UTCEG score recompute
- 2026-07-05 15:26 UTCGHSA enrichment
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-04 15:55 UTCEG score recompute
- 2026-07-04 15:55 UTCGHSA enrichment
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-03 16:28 UTCEG score recompute
- 2026-07-03 16:28 UTCGHSA enrichment
- 2026-07-02 16:59 UTCEG score recompute▲ 6.40
- 2026-07-02 16:59 UTCGHSA enrichment
- 2026-07-02 16:58 UTCNVD updateCVSS v3 → 6.4 · CVSS v4 → 6.4
- 2026-07-02 12:36 UTCEG score recompute
- 2026-07-02 12:36 UTCGHSA enrichment
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-14449?
When was CVE-2026-14449 disclosed?
Is CVE-2026-14449 actively exploited?
What is the CVSS score of CVE-2026-14449?
How do I remediate CVE-2026-14449?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-14449
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