CVE-2021-25094

Name: CVE-2021-25094
Creator: NVD / NIST
Published: 2022-04-25T16:16:07.117+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 83.53%

Last modified Jun 17, 2026

CVE-2021-25094 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", this can bypass extension control implemented in the plugin. EPSS estimates a 83.53% chance of exploitation in the next 30 days.

Description

The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", this can bypass extension control implemented in the plugin. Moreover, there is a race condition in the zip extraction process which makes the shell file live long enough on the filesystem to be callable by an attacker.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

83.53%

99.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Brandexponents	Tatsu	< 3.3.12

References

http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcdExploit, Third Party Advisory
http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/Exploit, Third Party Advisory
https://packetstorm.news/files/id/190566/
https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcdExploit, Third Party Advisory
https://www.exploit-db.com/exploits/52260

Timeline

Published: Apr 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25094?

How severe is CVE-2021-25094?

CVE-2021-25094 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 83.53% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25094?

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-2021-25094?

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

Scan your code now

Source: NVD / NIST