CVE-2021-39267

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-18 · updated 2026-06-17
Weakness: CWE-79

Description

Persistent cross-site scripting (XSS) in the web interface of SuiteCRM before 7.11.19 allows a remote attacker to introduce arbitrary JavaScript via a Content-Type Filter bypass to upload malicious files. This occurs because text/html is blocked, but other types that allow JavaScript execution (such as text/xml) are not blocked.

Affected products

salesagility SuiteCRM: before 7.11.19 — fixed in 7.11.19

How to fix

Upgrade to a fixed version: salesagility SuiteCRM 7.11.19. Check the vendor advisory for mitigations.

References

https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19
https://github.com/salesagility/SuiteCRM
https://thanhlocpanda.wordpress.com/2021/07/31/file-upload-bypass-suitecrm-7-11-18/
https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19
https://github.com/salesagility/SuiteCRM
https://thanhlocpanda.wordpress.com/2021/07/31/file-upload-bypass-suitecrm-7-11-18/

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