CVE-2021-25094

HIGHNVD 8.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 83% probability of exploitation within the next 30 days (top 0.3% of all CVEs). NVD baseline CVSS 8.1 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
8.1
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 83%
CISA-KEV: Not listedEPSS: 83%CVSS: 8.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.1
EG Score
9.0(high)
EG Risk
78(Track)
EG Risk 78/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation83% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.7%
KEV
Not listed

Published

April 25, 2022

Last Modified

April 21, 2025

References (8)

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 01:58 UTCEG score recompute▲ 0.90
  3. 2026-07-22 22:45 UTCEG score recompute▼ 0.90
  4. 2026-07-22 14:06 UTCEPSS rescore
  5. 2026-07-22 14:06 UTCEPSS rescore
  6. 2026-07-21 15:22 UTCEPSS rescore
  7. 2026-07-21 15:22 UTCEPSS rescore
  8. 2026-07-20 17:05 UTCEPSS rescore
  9. 2026-07-16 17:00 UTCEPSS rescore
  10. 2026-07-15 16:55 UTCEPSS rescore
  11. 2026-07-15 16:55 UTCEPSS rescore
  12. 2026-07-13 06:10 UTCEPSS rescore
  13. 2026-07-09 19:07 UTCEPSS rescore
  14. 2026-07-04 06:29 UTCEPSS rescore
  15. 2026-07-04 06:29 UTCEPSS rescore
  16. 2026-07-01 15:03 UTCEPSS rescore
  17. 2026-06-29 14:04 UTCEPSS rescore
  18. 2026-06-28 14:05 UTCEPSS rescore
  19. 2026-06-28 04:54 UTCEPSS rescore
  20. 2026-06-28 04:54 UTCEPSS rescore
  21. 2026-06-25 13:48 UTCEPSS rescore
  22. 2026-06-25 13:48 UTCEPSS rescore
  23. 2026-06-24 14:03 UTCEPSS rescore
  24. 2026-06-24 14:03 UTCEPSS rescore
  25. 2026-06-23 21:31 UTCEPSS rescore
Show 28 more
  1. 2026-06-23 21:31 UTCEPSS rescore
  2. 2026-06-18 17:51 UTCEPSS rescore
  3. 2026-06-18 17:51 UTCEPSS rescore
  4. 2026-06-17 17:51 UTCEPSS rescore
  5. 2026-06-15 17:46 UTCEPSS rescore
  6. 2026-06-14 23:15 UTCEPSS rescore
  7. 2026-06-13 22:58 UTCEPSS rescore
  8. 2026-06-13 22:58 UTCEPSS rescore
  9. 2026-06-12 23:10 UTCEPSS rescore
  10. 2026-06-10 22:16 UTCEPSS rescore
  11. 2026-06-10 13:20 UTCEPSS rescore
  12. 2026-06-08 14:15 UTCEPSS rescore
  13. 2026-06-05 22:45 UTCEPSS rescore
  14. 2026-06-05 22:45 UTCEPSS rescore
  15. 2026-06-05 06:09 UTCEPSS rescore
  16. 2026-06-05 06:09 UTCEPSS rescore
  17. 2026-06-04 13:10 UTCEPSS rescore
  18. 2026-06-04 13:10 UTCEPSS rescore
  19. 2026-05-31 00:15 UTCEPSS rescore
  20. 2026-05-29 13:42 UTCEPSS rescore
  21. 2026-05-28 13:43 UTCEPSS rescore
  22. 2026-05-28 13:43 UTCEPSS rescore
  23. 2026-05-27 13:39 UTCEPSS rescore
  24. 2026-05-27 13:39 UTCEPSS rescore
  25. 2026-05-26 13:42 UTCEPSS rescore
  26. 2026-05-25 23:13 UTCEG score recompute
  27. 2026-05-25 23:13 UTCGHSA enrichment
  28. 2026-05-25 06:07 UTCOSV refresh

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52260
    First seen Apr 18, 2025

    Tatsu 3.3.11 - Unauthenticated RCE

    Open source ↗
  • Metasploitexploit/multi/http/wp_tatsu_rce✓ verified
    First seen Apr 25, 2022

    Tatsu Wordpress Plugin RCE

    Open source ↗
  • GitHub PoCdarkpills/CVE-2021-25094-tatsu-preauth-rce
    First seen Jan 3, 2022
    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-25094.yaml
    First seen Jan 1, 2021

    Wordpress Tatsubuilder <= 3.3.11 - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2021-25094?
CVE-2021-25094 is a high vulnerability published on April 25, 2022. The Tatsu WordPress plugin before 3.3.12 addcustomfont 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…
When was CVE-2021-25094 disclosed?
CVE-2021-25094 was first published in the National Vulnerability Database on April 25, 2022, with the most recent update on April 21, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-25094 actively exploited?
CVE-2021-25094 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-25094?
CVE-2021-25094 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2021-25094?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-25094, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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