CVE-2021-39320

moderate-risk
Published 2021-09-01

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.

Do I need to act?

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19.7% chance of exploitation in next 30 days
EPSS score — higher than 80% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.1/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Underconstruction Project

References (4)

Third Party Advisory https://wpscan.com/vulnerability/49ae1df0-d6d2-4cbb-9a9d-bf3599429875
Third Party Advisory https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39320
Third Party Advisory https://wpscan.com/vulnerability/49ae1df0-d6d2-4cbb-9a9d-bf3599429875
Third Party Advisory https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39320
42
/ 100
moderate-risk
Severity 23/34 · High
Exploitability 14/34 · Moderate
Exposure 5/34 · Minimal