CVE-2025-55996: Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward int

Q: How do I fix CVE-2025-55996?

viber: upgrade to newer than 25.6.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-55996 being exploited?

CVE-2025-55996 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-55996 affect?

CVE-2025-55996 affects viber. Severity is medium (CVSS 6.3). Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface

Q: How urgent is CVE-2025-55996?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 6.3UPGRADE

CVE-2025-55996 is a medium-severity flaw (CVSS 6.3) affecting viber. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-09-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: rakuten

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-12 15:15 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

rakuten viber UPGRADE

Affected: <= 25.6.0

Fixed in: newer than 25.6.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy viber || rpm -q viber || viber --version

2. UPGRADE to newer than 25.6.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade viber

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade viber

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-55996?

viber: upgrade to newer than 25.6.0. Exact commands for each OS are on this page.

Is CVE-2025-55996 being exploited?

CVE-2025-55996 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-55996 affect?

CVE-2025-55996 affects viber. Severity is medium (CVSS 6.3). Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface

How urgent is CVE-2025-55996?

Priority 24/100. No elevated risk signals yet.

Related CVEs

CVE-2025-13476 CRITICAL 9.8 UPGRADE DOWNGRADE Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable T

References

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