CVE-2021-39320

underConstruction <= 1.18 - Reflected Cross-Site Scripting

Description

The underConstruction plugin <= 1.18 for WordPress echoes out the raw value of `$GLOBALS['PHP_SELF']` in the ucOptions.php file. On certain configurations including Apache+modPHP, this makes it possible to use it to perform a reflected Cross-Site Scripting attack by injecting malicious code in the request path.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 15.44% Top 10%
Third-Party Advisory wpscan.com Third-Party Advisory wordfence.com
Affected: Noah Kagan underConstruction
Published at:
Updated at:

References

Link Tags
https://wpscan.com/vulnerability/49ae1df0-d6d2-4cbb-9a9d-bf3599429875 third party advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39320 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-39320?
CVE-2021-39320 has been scored as a medium severity vulnerability.
How to fix CVE-2021-39320?
To fix CVE-2021-39320, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39320 being actively exploited in the wild?
It is possible that CVE-2021-39320 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~15% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39320?
CVE-2021-39320 affects Noah Kagan underConstruction.
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