CVE-2021-45886

Name: CVE-2021-45886
Creator: NVD / NIST
Published: 2022-03-13T02:15:07.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2021-45886 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An issue was discovered in PONTON X/P Messenger before 3.11.2. Anti-CSRF tokens are globally valid, making the web application vulnerable to a weakened version of CSRF, where an arbitrary token of a low-privileged user (such as operator) can be used to confirm actions of higher-privileged ones (such as xpadmin).. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

An issue was discovered in PONTON X/P Messenger before 3.11.2. Anti-CSRF tokens are globally valid, making the web application vulnerable to a weakened version of CSRF, where an arbitrary token of a low-privileged user (such as operator) can be used to confirm actions of higher-privileged ones (such as xpadmin).

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.55%

41.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

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-2021-080.txtExploit, Release Notes, Third Party Advisory
https://www.ponton.de/products/xpmessenger/Product, Vendor Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-080.txtExploit, Release Notes, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-45886?

How severe is CVE-2021-45886?

CVE-2021-45886 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45886?

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-2021-45886?

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

Scan your code now

Source: NVD / NIST