CVE-2019-25737

Live Chat Unlimited 2.8.3 Stored Cross-Site Scripting

Published Jun 4, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

Live Chat Unlimited 2.8.3 contains a stored cross-site scripting vulnerability that 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.

Analysis

Technical impact

Live Chat Unlimited 2.8.3 contains a stored cross‑site scripting flaw in the chat input field. The vulnerability allows attackers to submit malicious payloads, including script tags and event handlers, that are stored and later executed in the administrator interface. This can lead to theft of session cookies or forced redirects to malicious sites.

Affected Systems

Affected systems are WordPress sites running the Screets Live Chat Unlimited plugin version 2.8.3. The product is distributed by Screets and is commonly installed as a live chat widget in WordPress installations.

Risk and Exploitability

The CVSS score of 5.3 indicates a moderate severity. No EPSS is available, and the vulnerability is not listed in the CISA KEV catalog. Attackers can act without authentication by posting the payload via the publicly exposed chat box. The stored scripts execute when an administrator opens the chat, thus the vulnerability is primarily an administrative‑side code execution risk. Even though the exploit does not provide server‑side code execution, it can facilitate credential theft or redirect attacks. Prompt patching mitigates this risk.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Screets

Live Chat Unlimited

affected

Version	Status	Constraints
`2.8.3`	affected	—

No data.

Vendor Product Versions

Screets

Live Chat Unlimited

Version	Status	Scheme	Platform
`2.8.3`	affected	semver	—

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Live Chat Unlimited to the latest version that addresses stored XSS (greater than 2.8.3).
Ensure that the chat input field sanitizes user input; configure a content security policy to limit script execution in admin pages.
Disable chat functionality for unauthenticated users or restrict chat access to authenticated users only.

Generated by OpenCVE AI on June 5, 2026 at 12:24 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.211% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://codecanyon.net/item/wordpress-live-chat-plugin/3952877
https://screets.com/
https://www.exploit-db.com/exploits/47037
https://www.vulncheck.com/advisories/live-chat-unlimited-stored-cross-site-scripting

History

Jun 11, 2026 4:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jun 10, 2026 1:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}`	cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}`

Jun 5, 2026 11:45 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	cvssV4_0 `{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}`	cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}`

Jun 5, 2026 10:45 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Screets Screets live Chat Unlimited Wordpress Wordpress wordpress
Vendors & Products		Screets Screets live Chat Unlimited Wordpress Wordpress wordpress

Jun 4, 2026 2:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jun 4, 2026 1:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Live Chat Unlimited 2.8.3 contains a stored cross-site scripting vulnerability that 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.
Title		Live Chat Unlimited 2.8.3 Stored Cross-Site Scripting
Weaknesses		CWE-79
References		https://codecanyon.net/item/wordpress-live-chat-plugin/3952877 https://screets.com/ https://www.exploit-db.com/exploits/47037 https://www.vulncheck.com/advisories/live-chat-unlimited-stored-cross-site-scripting
Metrics		cvssV3_1 `{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}` cvssV4_0 `{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}`