CVE-2020-21783

Name: CVE-2020-21783
Creator: NVD / NIST
Published: 2021-06-24T16:15:08.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2020-21783 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In IBOS 4.5.4 the email function has a cross site scripting (XSS) vulnerability in emailbody[content] parameter.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

In IBOS 4.5.4 the email function has a cross site scripting (XSS) vulnerability in emailbody[content] parameter.

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

0.69%

48.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Ibos	Ibos	4.5.4

References

https://gitee.com/ibos/IBOS/issues/I189ZFExploit, Third Party Advisory
https://gitee.com/ibos/IBOS/issues/I189ZFExploit, Third Party Advisory

Timeline

Published: Jun 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21783?

In IBOS 4.5.4 the email function has a cross site scripting (XSS) vulnerability in emailbody[content] parameter.

How severe is CVE-2020-21783?

CVE-2020-21783 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21783?

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-2020-21783?

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

Scan your code now

Source: NVD / NIST