CVE-2025-31475Network attack vector

Prototype pollution via inherited custom-text properties

Published Apr 7, 2025 · Updated Apr 7, 2025

Prototype pollution in Amauri Champeaux tarteaucitron.js before 1.20.1 allows remote authenticated users to alter object prototypes. AddOrUpdate recursively copies enumerable custom-text properties without restricting inherited keys, proto, or constructor, allowing assignments into prototype state. Exploitation requires high-privilege access to site source or a CMS plugin and can corrupt application data or behavior, including causing crashes.

CVSS severity5.5
Medium
EPSS probability0.34%
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 Amauri Champeaux tarteaucitron.js before 1.20.1 allows remote authenticated users to alter object prototypes. AddOrUpdate recursively copies enumerable custom-text properties without restricting inherited keys, proto, or constructor, allowing assignments into prototype state. Exploitation requires high-privilege access to site source or a CMS plugin and can corrupt application data or behavior, including causing crashes.

The record

CVE
CVE-2025-31475
Published
Apr 7, 2025
Updated
Apr 7, 2025
Vendor
Amauri Champeaux
Product
tarteaucitron.js
Classifications
CWE-1321
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 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?

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

  1. Affected versionversion=< 1.20.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Amauri Champeaux · tarteaucitron.jsversion=< 1.20.1

Published CVSS scores

5.5GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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