Stored cross-site scripting in EspoCRM EspoCRM

1) Stored cross-site scripting

EUVDB-ID: #VU19955

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-14546

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the Preference page as well as while sending an email when a malicious payload was inserted inside the Email Signature. A remote attacker can send a specially crafted email, trick the victim to reply or forward the email and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EspoCRM: 5.6.0 - 5.6.8

External links

http://gauravnarwani.com/publications/CVE-2019-14546/
http://github.com/espocrm/espocrm/commit/ffd3f762ce4a8de3b8962f33513e073c55d943b5
http://github.com/espocrm/espocrm/issues/1369
http://github.com/espocrm/espocrm/releases/tag/5.6.9

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. However, proof of concept for this vulnerability is available.