What is CVE-2021-40285?

CVE-2021-40285 is a high-severity vulnerability in Htmly, classified under Path Traversal. CVSS score: 8.1/10. Published 2022-08-26.

How severe is CVE-2021-40285?

High severity. CVSS v3 base score is 8.1 out of 10.

Path Traversal in Htmly

CVE-2021-40285

htmly v2.8.1 was discovered to contain an arbitrary file deletion vulnerability via the component \views\backup.html.php.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2022-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.000

Affected products

Htmly — versions 2.8.1

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/danpros/htmly/issues/462 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-40285?: CVE-2021-40285 is a high-severity vulnerability in Htmly, classified under Path Traversal. CVSS score: 8.1/10. Published 2022-08-26.
How severe is CVE-2021-40285?: High severity. CVSS v3 base score is 8.1 out of 10.