What is CVE-2021-25912?

CVE-2021-25912 is a critical-severity vulnerability in Dotty Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2021-02-02.

How severe is CVE-2021-25912?

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

Prototype Pollution in Dotty Project

CVE-2021-25912

Prototype pollution vulnerability in 'dotty' versions 0.0.1 through 0.1.0 allows attackers to cause a denial of service and may lead to remote code execution.

Vulnerability class: Prototype Pollution

Published 2021-02-02 · 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: 0.033 (88.3th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Dotty Project
Dotty — versions 0.0.1, 0.0.2, 0.1.0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25912 (Exploit, Third Party Advisory)
github.com/deoxxa/dotty/commit/cd997d37917186c131be71501a698803f2b7ebdb (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-25912?: CVE-2021-25912 is a critical-severity vulnerability in Dotty Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2021-02-02.
How severe is CVE-2021-25912?: Critical severity. CVSS v3 base score is 9.8 out of 10.