CVE-2021-42112

Name: CVE-2021-42112
Creator: NVD / NIST
Published: 2021-10-08T21:15:07.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.48%

Last modified Jun 17, 2026

CVE-2021-42112 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The "File upload question" functionality in LimeSurvey 3.x-LTS through 3.27.18 allows XSS in assets/scripts/modaldialog.js and assets/scripts/uploader.js.. EPSS estimates a 1.48% chance of exploitation in the next 30 days.

Description

The "File upload question" functionality in LimeSurvey 3.x-LTS through 3.27.18 allows XSS in assets/scripts/modaldialog.js and assets/scripts/uploader.js.

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

1.48%

70.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Limesurvey	Limesurvey	>= 3.0.0, <= 3.27.18

References

https://bugs.limesurvey.org/view.php?id=17562Permissions Required
https://github.com/LimeSurvey/LimeSurvey/commit/d56619a50cfd191bbffd0adb660638a5e438070dPatch, Third Party Advisory
https://www.on-x.com/sites/default/files/on-x_-_security_advisory_-_limesurvey_-_cve-2021-42112.pdfExploit, Third Party Advisory
https://bugs.limesurvey.org/view.php?id=17562Permissions Required
https://github.com/LimeSurvey/LimeSurvey/commit/d56619a50cfd191bbffd0adb660638a5e438070dPatch, Third Party Advisory
https://www.on-x.com/sites/default/files/on-x_-_security_advisory_-_limesurvey_-_cve-2021-42112.pdfExploit, Third Party Advisory

Timeline

Published: Oct 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42112?

The "File upload question" functionality in LimeSurvey 3.x-LTS through 3.27.18 allows XSS in assets/scripts/modaldialog.js and assets/scripts/uploader.js.

How severe is CVE-2021-42112?

CVE-2021-42112 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.48% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42112?

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-2021-42112?

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

Scan your code now

Source: NVD / NIST