What is CVE-2021-24376?

CVE-2021-24376 is a critical-severity vulnerability in Autoptimize, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-06-21.

How severe is CVE-2021-24376?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-24376 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Autoptimize

CVE-2021-24376

The Autoptimize WordPress plugin before 2.7.8 attempts to delete malicious files (such as .php) form the uploaded archive via the "Import Settings" feature, after its extraction. However, the extracted folders are not checked and it is possible to upload a zip which contained a directory with PHP file in it and then it is not removed from the disk. It is a bypass of CVE-2020-24948 which allows sending a PHP file via the "Import Settings" functionality to achieve Remote Code Execution.

Vulnerability class: Unrestricted File Upload

EPSS: 0.037 (88.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Autoptimize
Unknown Autoptimize — versions 2.7.8

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

contact@wpscan.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-24376?: CVE-2021-24376 is a critical-severity vulnerability in Autoptimize, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-06-21.
How severe is CVE-2021-24376?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-24376 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.