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PatchSiren cyber security CVE debrief

CVE-2019-25737 Screets CVE debrief

CVE-2019-25737 is a stored cross-site scripting (XSS) vulnerability in Live Chat Unlimited 2.8.3. The vulnerability allows unauthenticated attackers to inject malicious scripts through the chat input field. Attackers can submit payloads containing script tags and event handlers that execute in the admin area, enabling cookie theft or forced redirects to malicious websites. The CVSS score for this vulnerability is 5.3, with a severity rating of MEDIUM.

Vendor
Screets
Product
Live Chat Unlimited
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Administrators and users of Live Chat Unlimited 2.8.3 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by inadequate input validation and sanitization in the chat input field. This allows attackers to inject malicious scripts, which can then be executed in the admin area.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to a patched version of Live Chat Unlimited, if available.
  • Implement input validation and sanitization for the chat input field.
  • Monitor for suspicious activity and implement additional security measures to prevent exploitation.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information can be found at [ref-4], [ref-5], [ref-6], and [ref-7].

Sources and references

Verified primary and authoritative sources

  • CVE-2019-25737 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2019-25737

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2019-25737 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2019-25737

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.