CVE-2021-31583

Name: CVE-2021-31583
Creator: NVD / NIST
Published: 2021-04-23T21:15:08.31+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.12%

Last modified Jun 17, 2026

CVE-2021-31583 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Sipwise C5 NGCP WWW Admin version 3.6.7 up to and including platform version NGCP CE 3.0 has multiple authenticated stored and reflected XSS vulnerabilities when input passed via several parameters to several scripts is not properly sanitized before being returned to the user: Stored XSS in callforward/time/set/save (POST tsetname); Reflected XSS in addressbook (GET filter); Stored XSS in addressbook/save (POST firstname, lastname, company); and Reflected XSS in statistics/versions (GET lang).. EPSS estimates a 1.12% chance of exploitation in the next 30 days.

Description

Sipwise C5 NGCP WWW Admin version 3.6.7 up to and including platform version NGCP CE 3.0 has multiple authenticated stored and reflected XSS vulnerabilities when input passed via several parameters to several scripts is not properly sanitized before being returned to the user: Stored XSS in callforward/time/set/save (POST tsetname); Reflected XSS in addressbook (GET filter); Stored XSS in addressbook/save (POST firstname, lastname, company); and Reflected XSS in statistics/versions (GET lang).

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

1.12%

62.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sipwise	Next Generation Communication Platform	3.6.7

References

http://lists.sipwise.com/pipermail/spce-user_lists.sipwise.com/2021-September/014708.htmlExploit, Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/162316/Sipwise-C5-NGCP-CSC-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://www.sipwise.comProduct
https://www.zeroscience.mk/en/vulnerabilitiesExploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5648.phpExploit, Third Party Advisory
http://lists.sipwise.com/pipermail/spce-user_lists.sipwise.com/2021-September/014708.htmlExploit, Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/162316/Sipwise-C5-NGCP-CSC-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://www.sipwise.comProduct
https://www.zeroscience.mk/en/vulnerabilitiesExploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5648.phpExploit, Third Party Advisory

Timeline

Published: Apr 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31583?

How severe is CVE-2021-31583?

CVE-2021-31583 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.12% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31583?

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-2021-31583?

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

Scan your code now

Source: NVD / NIST