CVE-2021-45889

Name: CVE-2021-45889
Creator: NVD / NIST
Published: 2022-03-13T02:15:07.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2021-45889 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An issue was discovered in PONTON X/P Messenger before 3.11.2. Several functions are vulnerable to reflected XSS, as demonstrated by private/index.jsp?partners/ShowNonLocalPartners.do?localID= or private/index.jsp or private/index.jsp?database/databaseTab.jsp or private/index.jsp?activation/activationMainTab.jsp or private/index.jsp?communication/serverTab.jsp or private/index.jsp?emailNotification/notificationTab.jsp.. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

An issue was discovered in PONTON X/P Messenger before 3.11.2. Several functions are vulnerable to reflected XSS, as demonstrated by private/index.jsp?partners/ShowNonLocalPartners.do?localID= or private/index.jsp or private/index.jsp?database/databaseTab.jsp or private/index.jsp?activation/activationMainTab.jsp or private/index.jsp?communication/serverTab.jsp or private/index.jsp?emailNotification/notificationTab.jsp.

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

0.58%

43.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Ponton	X\/P Messenger	3.8.0
Ponton	X\/P Messenger	3.10.0

References

https://www.ponton.de/products/xpmessenger/Product, Vendor Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-078.txtExploit, Third Party Advisory
https://www.ponton.de/products/xpmessenger/Product, Vendor Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-078.txtExploit, Third Party Advisory

Timeline

Published: Mar 13, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45889?

How severe is CVE-2021-45889?

CVE-2021-45889 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45889?

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-2021-45889?

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

Scan your code now

Source: NVD / NIST