CVE-2024-38988Public exploitNetwork attack vector

Code execution via unsafe prototype property assignment

Published Mar 28, 2025 · Updated Apr 1, 2025

Prototype pollution in alizeait unflatto 1.0.2 and earlier allows attackers to corrupt object prototypes through crafted keys. The exports.unflatto method in dist/index.js expands dot-delimited source keys and assigns proto or constructor.prototype paths into Object.prototype without filtering them. Exploitation requires a consuming application to pass attacker-controlled flattened keys; polluted properties can alter application logic, leading to code execution or a service crash.

CVSS severity9.8
Critical
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 alizeait unflatto 1.0.2 and earlier allows attackers to corrupt object prototypes through crafted keys. The exports.unflatto method in dist/index.js expands dot-delimited source keys and assigns proto or constructor.prototype paths into Object.prototype without filtering them. Exploitation requires a consuming application to pass attacker-controlled flattened keys; polluted properties can alter application logic, leading to code execution or a service crash.

The record

CVE
CVE-2024-38988
Published
Mar 28, 2025
Updated
Apr 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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