CVE-2021-29267

Name: CVE-2021-29267
Creator: NVD / NIST
Published: 2021-03-29T16:15:13.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-29267 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Sherlock SherlockIM through 2021-03-29 allows Cross Site Scripting (XSS) by leveraging the api/Files/Attachment URI to attack help-desk staff via the chatbot feature.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

Sherlock SherlockIM through 2021-03-29 allows Cross Site Scripting (XSS) by leveraging the api/Files/Attachment URI to attack help-desk staff via the chatbot feature.

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

0.85%

53.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sherlockim	Sherlockim	<= 2021-03-29

References

https://github.com/Security-AVS/CVE-2021-29267Exploit, Third Party Advisory
https://sherlockim.aeProduct
https://github.com/Security-AVS/CVE-2021-29267Exploit, Third Party Advisory
https://sherlockim.aeProduct

Timeline

Published: Mar 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29267?

Sherlock SherlockIM through 2021-03-29 allows Cross Site Scripting (XSS) by leveraging the api/Files/Attachment URI to attack help-desk staff via the chatbot feature.

How severe is CVE-2021-29267?

CVE-2021-29267 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29267?

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-2021-29267?

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

Scan your code now

Source: NVD / NIST