Information disclosure in Apple Safari

Published: 2020-08-25
Risk Medium
Patch available NO
Number of vulnerabilities 1
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Apple Safari
Client/Desktop applications / Web browsers

Vendor Apple Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Input Validation

EUVDB-ID: #VU46006

Risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C]


CWE-ID: CWE-20 - Improper input validation

Exploit availability: No


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input in the Web Share API. A remote attacker can trick a victim to share a message and gain unauthorized access to sensitive information on the system, such as local files.

Note: This vulnerability affects iOS (13.4.1, 13.6), macOS Mojave 10.14.16 with Safari 13.1 (14609. and on macOS Catalina 10.15.5 with Safari 13.1.1 (15609.  


Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Apple Safari: 13.1 - 13.1.1

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.