CVE-2025-55996

MEDIUM

Viber < 25.6.0 - HTML Injection via Message Compose/Forward Text Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-55996. PoCs published by thawkhant.

AI-analyzed exploit summary This repository contains a writeup for CVE-2025-55996, detailing an HTML injection vulnerability in Viber Desktop's deep-link handler. The vulnerability allows unsanitized HTML rendering in the message compose/forward interface, enabling remote resource loading and UI manipulation.

Description

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

Exploits (1)

nomisec WRITEUP 1 stars
by thawkhant · poc
https://github.com/thawkhant/viber-desktop-html-injection

This repository contains a writeup for CVE-2025-55996, detailing an HTML injection vulnerability in Viber Desktop's deep-link handler. The vulnerability allows unsanitized HTML rendering in the message compose/forward interface, enabling remote resource loading and UI manipulation.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Viber Desktop 25.6.0 (and possibly earlier)
No auth needed
Prerequisites: User interaction to click a crafted deep link
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 6.3
EPSS 0.0018
EPSS Percentile 7.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
rakuten/viber < 25.6.0
Published Sep 12, 2025
Tracked Since Feb 18, 2026