Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface
Priority MEDIUM 61CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00191 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rakuten:viber:*:*:*:*:*:windows:*:* | up to 25.6.0 | Vulnerable | Rakuten Mobile, Inc. |
- cpe:2.3:a:rakuten:viber:*:*:*:*:*:windows:*:* Versions up to 25.6.0 Vulnerable ·Rakuten Mobile, Inc.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-55996
- 2026-10-03 Alias added: GHSA-mr84-m23m-f429
References
More Rakuten Mobile, Inc. Viber vulnerabilities
- TI-2019-09383 A vulnerability in Viber before 10.7.0 for Desktop (Windows) could allow an attacker to… CVSS 3.0HIGH 7.8
- TI-2025-12320 Rakuten Viber uses broken or risky cryptographic Algorithm CVSS 3.1CRITICAL 9.8
- TI-2019-13537 Viber through 11.7.0.5 allows a remote attacker who can capture a victim's internet… CVSS 3.1HIGH 8.8
- TI-2020-11005 Viber for Windows up to 13.2.0.39 does not properly quote its custom URI handler. CVSS 3.1HIGH 7.5
- TI-2018-02955 Information disclosure in Rakuten Viber CVSS 3.1MEDIUM 5.5
Sources
- CVE-2025-55996 · CVE Program
- CVE-2025-55996 · NVD
- FIRST EPSS
- GHSA-mr84-m23m-f429 · GitHub Advisory Database · CC BY 4.0
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