Etherpad security update for ejs

1) Code Injection

EUVDB-ID: #VU50710

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary JS code on the target system.

The vulnerability exists due to improper input validation passed via the filename in lib/ejs.js. A remote attacker can send a specially crafted request and execute arbitrary JavaScript code in victim's browser.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Etherpad: 1.0 - 1.8.7

External links

http://github.com/ether/etherpad-lite/releases/tag/1.8.8

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.