CVE-2021-33904

Name: CVE-2021-33904
Creator: NVD / NIST
Published: 2021-06-07T12:15:09.107+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 10.05%

Last modified Jun 17, 2026

CVE-2021-33904 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In Accela Civic Platform through 21.1, the security/hostSignon.do parameter servProvCode is vulnerable to XSS. NOTE: The vendor states "there are configurable security flags and we are unable to reproduce them with the available information.. EPSS estimates a 10.05% chance of exploitation in the next 30 days.

Description

In Accela Civic Platform through 21.1, the security/hostSignon.do parameter servProvCode is vulnerable to XSS. NOTE: The vendor states "there are configurable security flags and we are unable to reproduce them with the available 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

10.05%

95.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Accela	Civic Platform	<= 21.1

References

http://packetstormsecurity.com/files/163093/Accela-Civic-Platorm-21.1-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://gist.github.com/0xx7/3d934939d7122fe23db11bc48eda9d21Third Party Advisory
http://packetstormsecurity.com/files/163093/Accela-Civic-Platorm-21.1-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://gist.github.com/0xx7/3d934939d7122fe23db11bc48eda9d21Third Party Advisory

Timeline

Published: Jun 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33904?

How severe is CVE-2021-33904?

CVE-2021-33904 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 10.05% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33904?

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-2021-33904?

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

Scan your code now

Source: NVD / NIST