PatchTheCVECVE-2021-25094: The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to up
CVE-2021-25094 is a high-severity flaw (CVSS 8.1) affecting tatsu. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 b
Why this priority
- High severity
- EPSS top 1%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 83.2% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-306 |
| Published | 2022-04-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: Tatsu 3.3.11 - Unauthenticated RCE
- Metasploit: Tatsu Wordpress Plugin RCE
- Nuclei scan template: Wordpress Tatsubuilder <= 3.3.11 - Remote Code Execution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-25094?
tatsu: upgrade to 3.3.12. Exact commands for each OS are on this page.
Is CVE-2021-25094 being exploited?
CVE-2021-25094 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-25094 affect?
CVE-2021-25094 affects tatsu. Severity is high (CVSS 8.1). 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
How urgent is CVE-2021-25094?
Priority 63/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
WordPress vulnerabilities · PHP vulnerabilities