CVE-2025-55996 Cross-site scripting in n/a

Medium 6.3 Published 12 Sep 2025 Updated 12 Sep 2025

Attackers can inject malicious HTML into Viber Desktop messages, potentially executing code or bypassing security controls.

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-2025-55996?

CVE-2025-55996 is a medium-severity cross-site scripting vulnerability in n/a, published on 12 Sep 2025. 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

Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface

Weakness: CWE-79

Which versions are affected by CVE-2025-55996?

It affects 1 product.

Products include Rakuten Viber.

How do I fix CVE-2025-55996?

No fix has been published for CVE-2025-55996 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-2025-55996 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55996 exists.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-mr84-m23m-f429.