Medium severity · published Feb 13, 2020
CVE-2018-3987
An exploitable information disclosure vulnerability exists in the 'Secret Chats' functionality of Rakuten Viber on Android 9.3.0.6
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
An exploitable information disclosure vulnerability exists in the 'Secret Chats' functionality of Rakuten Viber on Android 9.3.0.6. The 'Secret Chats' functionality allows a user to delete all traces of a chat either by using a time trigger or by direct request. There is a bug in this functionality which leaves behind photos taken and shared on the secret chats, even after the chats are deleted. These photos will be stored in the device and accessible to all applications installed on the Android device.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
Viber · Rakuten
9.3.0.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3987
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-3987
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0655
More from Viber
9.8
CVE-2025-13476
Rakuten Viber uses broken or risky cryptographic Algorithm
8.8
CVE-2019-18800
Viber through 11.7.0.5 allows a remote attacker who can capture a victim's internet traffic to steal their Viber account, because not all Viber protocol traffic is encrypted
7.8
CVE-2019-12569
A vulnerability in Viber before 10.7.0 for Desktop (Windows) could allow an attacker to execute arbitrary commands on a targeted system
7.5
CVE-2020-14049
Viber for Windows up to 13.2.0.39 does not properly quote its custom URI handler
6.3
CVE-2025-55996
Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface
