How severe is CVE-2026-14449?

CVE-2026-14449 has a CVSS 4.0 base score of 6.4, rated medium severity.

Is CVE-2026-14449 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-14449?

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

When was CVE-2026-14449 published?

CVE-2026-14449 was published on 2026-07-02.

CVE-2026-14449

CVE-2026-14449 is a medium-severity vulnerability with a CVSS 4.0 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 4.0 base score 6.4)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Published: 2026-07-02
Last modified: 2026-07-02

Description

u5CMS through v12.8.8 is vulnerable to reflected XSS via the ‘thanks’ parameter in multiple form components

Frequently asked questions

What is CVE-2026-14449?: u5CMS through v12.8.8 is vulnerable to reflected XSS via the ‘thanks’ parameter in multiple form components
How severe is CVE-2026-14449?: CVE-2026-14449 has a CVSS 4.0 base score of 6.4, rated medium severity.
Is CVE-2026-14449 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-14449?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-14449 published?: CVE-2026-14449 was published on 2026-07-02.

References

https://github.com/u5cms/u5cms/releases/tag/v12.8.9

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