Vulnerability identifier: #VU31355

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-6835

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Etherpad
Web applications / CMS

Vendor: The Etherpad Foundation

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass intended access restrictions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Etherpad: 1.6.0 - 1.6.2

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External links
http://github.com/ether/etherpad-lite/commit/626e58cc5af1db3691b41fca7b06c28ea43141b1
http://github.com/ether/etherpad-lite/releases/tag/1.6.3

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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