CVE-2020-22453

Name: CVE-2020-22453
Creator: NVD / NIST
Published: 2020-09-24T14:15:13.4+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2020-22453 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Untis WebUntis before 2020.9.6 allows XSS in multiple functions that store information.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Untis WebUntis before 2020.9.6 allows XSS in multiple functions that store information.

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

0.66%

46.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Untis	Webuntis	< 2020.9.6

References

https://help.untis.at/hc/en-150/articles/360008456699Release Notes, Vendor Advisory
https://robin.meis.space/2020/03/11/notenmanipulation-in-elektronischen-klassenbuchern/Third Party Advisory
https://help.untis.at/hc/en-150/articles/360008456699Release Notes, Vendor Advisory
https://robin.meis.space/2020/03/11/notenmanipulation-in-elektronischen-klassenbuchern/Third Party Advisory

Timeline

Published: Sep 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-22453?

Untis WebUntis before 2020.9.6 allows XSS in multiple functions that store information.

How severe is CVE-2020-22453?

CVE-2020-22453 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2020-22453?

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-2020-22453?

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

Scan your code now

Source: NVD / NIST