CVE-2021-39267

Name: CVE-2021-39267
Creator: NVD / NIST
Published: 2021-08-18T01:15:06.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.97%

Last modified Jun 17, 2026

CVE-2021-39267 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.97% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.97%

77.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Salesagility	Suitecrm	< 7.11.19

References

https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19Release Notes, Vendor Advisory
https://github.com/salesagility/SuiteCRMProduct, Third Party Advisory
https://thanhlocpanda.wordpress.com/2021/07/31/file-upload-bypass-suitecrm-7-11-18/Exploit, Third Party Advisory
https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19Release Notes, Vendor Advisory
https://github.com/salesagility/SuiteCRMProduct, Third Party Advisory
https://thanhlocpanda.wordpress.com/2021/07/31/file-upload-bypass-suitecrm-7-11-18/Exploit, Third Party Advisory

Timeline

Published: Aug 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39267?

How severe is CVE-2021-39267?

CVE-2021-39267 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.97% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39267?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39267?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST