Improper authentication in iThemes Sync plugin for WordPress

1) Improper Authentication

EUVDB-ID: #VU21967

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to insufficient secure key validation. A remote authenticated attacker can add his own “secure key” to a site with the sync plugin, bypass authentication process, gain unauthorized access to the application and perform arbitrary actions, such as Add/Remove plugins or themes on your sites, manipulate content on your sites or Add/Change/Remove users on your sites.

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Mitigation

Install updates from vendor's website.

Vulnerable software versions

iThemes Sync: 2.0.0 - 2.0.17

External links

http://plugins.trac.wordpress.org/changeset/2170620/ithemes-sync
http://ithemes.com/important-ithemes-sync-vulnerability-patched/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.