How severe is CVE-2026-0483?

CVE-2026-0483 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2026-0483 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-0483?

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

Does CVE-2026-0483 have an EU (EUVD) identifier?

Yes. CVE-2026-0483 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4895.

When was CVE-2026-0483 published?

CVE-2026-0483 was published on 2026-01-28 and last updated on 2026-06-17.

CVE-2026-0483

CVE-2026-0483 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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 6.9)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4895
Weakness: CWE-79
Published: 2026-01-28
Last modified: 2026-06-17

Description

Stored Cross-Site Scripting (XSS) vulnerability in the PDF file upload functionality of Live Helper Chat, versions prior to 4.72. An attacker can upload a malicious PDF file containing an XSS payload, which will be executed in the user's context when they download and open the file via the link generated by the application. The vulnerability allows arbitrary JavaScript code to be executed in the user's local context.

Frequently asked questions

What is CVE-2026-0483?: Stored Cross-Site Scripting (XSS) vulnerability in the PDF file upload functionality of Live Helper Chat, versions prior to 4.72. An attacker can upload a malicious PDF file containing an XSS payload, which will be executed in the user's context when they download and open the file via the link generated by the application. The vulnerability allows arbitrary JavaScript code to be executed in the user's local context.
How severe is CVE-2026-0483?: CVE-2026-0483 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2026-0483 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-0483?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0483 have an EU (EUVD) identifier?: Yes. CVE-2026-0483 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4895.
When was CVE-2026-0483 published?: CVE-2026-0483 was published on 2026-01-28 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/stored-cross-site-scripting-xss-vulnerability-livehelperchat

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