CVE-2020-36632

Name: CVE-2020-36632
Creator: NVD / NIST
Published: 2022-12-25T20:15:25.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.11%

Last modified Jun 17, 2026

CVE-2020-36632 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability, which was classified as critical, was found in hughsk flat up to 5.0.0. This affects the function unflatten of the file index.js. EPSS estimates a 1.11% chance of exploitation in the next 30 days.

Description

A vulnerability, which was classified as critical, was found in hughsk flat up to 5.0.0. This affects the function unflatten of the file index.js. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). It is possible to initiate the attack remotely. Upgrading to version 5.0.1 is able to address this issue. The name of the patch is 20ef0ef55dfa028caddaedbcb33efbdb04d18e13. It is recommended to upgrade the affected component. The identifier VDB-216777 was assigned to this vulnerability.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.11%

61.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Flat Project	Flat	< 5.0.1

References

https://github.com/hughsk/flat/commit/20ef0ef55dfa028caddaedbcb33efbdb04d18e13Patch, Third Party Advisory
https://github.com/hughsk/flat/issues/105Issue Tracking, Third Party Advisory
https://github.com/hughsk/flat/pull/106Patch, Third Party Advisory
https://github.com/hughsk/flat/releases/tag/5.0.1Release Notes, Third Party Advisory
https://vuldb.com/?ctiid.216777Third Party Advisory
https://vuldb.com/?id.216777Third Party Advisory
https://github.com/hughsk/flat/commit/20ef0ef55dfa028caddaedbcb33efbdb04d18e13Patch, Third Party Advisory
https://github.com/hughsk/flat/issues/105Issue Tracking, Third Party Advisory
https://github.com/hughsk/flat/pull/106Patch, Third Party Advisory
https://github.com/hughsk/flat/releases/tag/5.0.1Release Notes, Third Party Advisory
https://vuldb.com/?ctiid.216777Third Party Advisory
https://vuldb.com/?id.216777Third Party Advisory

Timeline

Published: Dec 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-36632?

How severe is CVE-2020-36632?

CVE-2020-36632 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.11% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36632?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-36632?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST