CVE-2025-62320 HTML Injection Leading to Data Exfiltration to External Server vulnerability affects HCL Unica Platform

Medium 4.7 Published 17 Mar 2026 Updated 17 Mar 2026

Attackers can inject HTML to trigger external requests, potentially exfiltrating user data from HCL Unica Platform.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-62320?

CVE-2025-62320 is a medium-severity cross-site scripting vulnerability in HCL Sametime, published on 17 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

HTML Injection can be carried out in Product when a web application does not properly check or clean user input before showing it on a webpage. Because of this, an attacker may insert unwanted HTML code into the page. When the browser loads the page, it may automatically interact with external resources included in that HTML, which can cause unexpected requests from the user’s browser.

Weakness: CWE-79

Which versions are affected by CVE-2025-62320?

It affects 9 products.

Products include Hcltech Unica, Hcltech Unica Audience Central, Hcltech Unica Campaign, Hcltech Unica Centralised Offer Management, Hcltech Unica Contact Central, Hcltech Unica Interact and 3 more.

How do I fix CVE-2025-62320?

No fix has been published for CVE-2025-62320 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-62320 being exploited?

There is no known exploitation of CVE-2025-62320 in the wild and no public exploit code.

Sources

Also known as GHSA-mmv4-545x-g5fr.