CVE-2020-28450Public exploitNetwork attack vector

Prototype pollution via unchecked recursive merge

Published Feb 4, 2021 · Updated Sep 17, 2024

Prototype pollution in Gigafied Decal 2.1.3 and earlier allows remote attackers to modify inherited properties via crafted input. The extend function recursively copies enumerable source properties into a target without rejecting prototype-mutating keys, allowing a crafted proto object to write values onto Object.prototype. A consuming application must pass attacker-controlled objects into the deep merge; polluted properties can alter application decisions or trigger a service crash.

CVSS severity8.6
High
EPSS probability1.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in Gigafied Decal 2.1.3 and earlier allows remote attackers to modify inherited properties via crafted input. The extend function recursively copies enumerable source properties into a target without rejecting prototype-mutating keys, allowing a crafted proto object to write values onto Object.prototype. A consuming application must pass attacker-controlled objects into the deep merge; polluted properties can alter application decisions or trigger a service crash.

The record

CVE
CVE-2020-28450
Published
Feb 4, 2021
Updated
Sep 17, 2024
Vendor
Gigafied
Product
Decal
Classifications
CWE-94, CWE-400, CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <unspecified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gigafied · Decalversion=0 <unspecified

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
8.6SnykCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-400Uncontrolled Resource Consumption
CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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