Cross-site scripting in EspoCRM

Published: 2018-09-21 | Updated: 2019-07-28

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-17301 CVE-2018-17302
CWE-ID	CWE-79
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	EspoCRM Web applications / CRM systems
Vendor	EspoCRM

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU19498

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-17301

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

Exploit availability: No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via /#Account in the search panel. A remote attacker can trick the victim to follow a specially crafted link 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: 5.3.0 - 5.4.2

External links

http://github.com/espocrm/espocrm/issues/1038
http://github.com/security-breachlock/CVE-2018-17301/blob/master/Non-persistent%20XSS%20in%20EspoCRM.pdf

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.

2) Stored cross-site scripting

EUVDB-ID: #VU19499

Risk: Low

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

CVE-ID: CVE-2018-17302