What’s Vulnerable › Vulnerabilities

CVE-2021-25094: Tatsu < 3.3.12 - Unauthenticated RCE

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 83.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-25 · updated 2026-06-17
• Weakness: CWE-306

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.

Affected products

• Tatsu: before 3.3.12 — fixed in 3.3.12

How to fix

Upgrade to a fixed version: Tatsu 3.3.12. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.html
• https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/
• https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcd
• http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.html
• https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/
• https://packetstorm.news/files/id/190566/
• https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcd
• https://www.exploit-db.com/exploits/52260

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