Multiple vulnerabilities in Strapi



Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-27666
CVE-2020-27665
CVE-2020-27664
CWE-ID CWE-79
CWE-264
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 strapi
Web applications / CMS

Vendor strapi.io

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Stored cross-site scripting

EUVDB-ID: #VU47916

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27666

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 wysiwyg editor's preview feature. A remote attacker can inject 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

strapi: 3.2.0 - 3.2.4

CPE2.3 External links

https://github.com/strapi/strapi/pull/8440
https://github.com/strapi/strapi/releases/tag/v3.2.5


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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU47917

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-27665

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to no admin::hasPermissions restriction for CTB (aka content-type-builder) routes, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

strapi: 3.2.0 - 3.2.4

CPE2.3 External links

https://github.com/strapi/strapi/pull/8439
https://github.com/strapi/strapi/releases/tag/v3.2.5


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.

3) Input validation error

EUVDB-ID: #VU47918

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-27664

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to unwanted /proxy?url= functionality in "admin/src/containers/InputModalStepperProvider/index.js".

Mitigation

Install updates from vendor's website.

Vulnerable software versions

strapi: 3.2.0 - 3.2.4

CPE2.3 External links

https://github.com/strapi/strapi/pull/8442
https://github.com/strapi/strapi/releases/tag/v3.2.5


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.



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