What is CVE-2020-19510?

CVE-2020-19510 is a critical-severity vulnerability in Microsoft Windows, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-06-21.

How severe is CVE-2020-19510?

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

Arbitrary file upload in Microsoft Windows

CVE-2020-19510

Textpattern 4.7.3 contains an aribtrary file load via the file_insert function in include/txp_file.php.

Vulnerability class: Unrestricted File Upload

Published 2021-06-21 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.015 (72.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Microsoft Windows
Textpattern — versions 4.7.3

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

blog.topsec.com.cn/textpattern-background-any-file-upload/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-19510?: CVE-2020-19510 is a critical-severity vulnerability in Microsoft Windows, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-06-21.
How severe is CVE-2020-19510?: Critical severity. CVSS v3 base score is 9.8 out of 10.