CVE-2021-4103

Name: CVE-2021-4103
Creator: NVD / NIST
Published: 2022-01-23T02:15:06.997+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2021-4103 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 1.0.34.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 1.0.34.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.66%

47.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
B3log	Vditor	< 1.0.34

References

https://github.com/vanessa219/vditor/commit/8d4d0889dd72b2f839e93a49db3da3a370416c7dPatch, Third Party Advisory
https://huntr.dev/bounties/67b980af-7357-4879-9448-a926c6474225Exploit, Patch, Third Party Advisory
https://github.com/vanessa219/vditor/commit/8d4d0889dd72b2f839e93a49db3da3a370416c7dPatch, Third Party Advisory
https://huntr.dev/bounties/67b980af-7357-4879-9448-a926c6474225Exploit, Patch, Third Party Advisory

Timeline

Published: Jan 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4103?

Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 1.0.34.

How severe is CVE-2021-4103?

CVE-2021-4103 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4103?

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-2021-4103?

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

Scan your code now

Source: NVD / NIST