CVE-2020-7617Public exploit

Object prototype modification via __proto__ sections

Published Apr 2, 2020 · Updated Aug 4, 2024

Prototype pollution in rawiroaisen ini-parser 0.0.2 and earlier allows local users to modify inherited object properties via crafted INI input. The parse function treats a proto section name as an ordinary object key, resolves it to Object.prototype, and writes parsed properties into that prototype. A caller must pass attacker-controlled INI text to parse; polluted properties then affect other objects in the same Node.js process, with downstream consequences determined by consuming code.

CVSS severity4.4
Medium
EPSS probability0.86%
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 rawiroaisen ini-parser 0.0.2 and earlier allows local users to modify inherited object properties via crafted INI input. The parse function treats a proto section name as an ordinary object key, resolves it to Object.prototype, and writes parsed properties into that prototype. A caller must pass attacker-controlled INI text to parse; polluted properties then affect other objects in the same Node.js process, with downstream consequences determined by consuming code.

The record

CVE
CVE-2020-7617
Published
Apr 2, 2020
Updated
Aug 4, 2024
Vendor
rawiroaisen
Product
ini-parser
Classifications
CWE-915, CWE-1321, CAPEC-1, CAPEC-77, CAPEC-180
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=unspecified <=0.0.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

rawiroaisen · ini-parserversion=unspecified <=0.0.2

Published CVSS scores

4.4SnykCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
CAPEC-77Manipulating User-Controlled Variables
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels

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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