CVE-2021-3340

Name: CVE-2021-3340
Creator: NVD / NIST
Published: 2021-02-01T22:15:14.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2021-3340 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A cross-site scripting (XSS) vulnerability in many forms of Wikindx before 5.7.0 and 6.x through 6.4.0 allows remote attackers to inject arbitrary web script or HTML via the message parameter to index.php?action=initLogon or modules/admin/DELETEIMAGES.php.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

A cross-site scripting (XSS) vulnerability in many forms of Wikindx before 5.7.0 and 6.x through 6.4.0 allows remote attackers to inject arbitrary web script or HTML via the message parameter to index.php?action=initLogon or modules/admin/DELETEIMAGES.php.

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

0.79%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Wikindx Project	Wikindx	< 5.7.0
Wikindx Project	Wikindx	>= 6.0.0, <= 6.4.0

References

https://sourceforge.net/p/wikindx/news/2021/01/wikindx-v641-released/Release Notes, Third Party Advisory
https://sourceforge.net/projects/wikindx/Product, Third Party Advisory
https://sourceforge.net/p/wikindx/news/2021/01/wikindx-v641-released/Release Notes, Third Party Advisory
https://sourceforge.net/projects/wikindx/Product, Third Party Advisory

Timeline

Published: Feb 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3340?

How severe is CVE-2021-3340?

CVE-2021-3340 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3340?

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-2021-3340?

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

Scan your code now

Source: NVD / NIST