sveltejs devalue up to 5.3.1 devalue.parse prototype pollution

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in sveltejs devalue up to 5.3.1. Affected by this issue is the function devalue.parse. Executing a manipulation can lead to prototype pollution. This vulnerability is registered as CVE-2025-57820. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in sveltejs devalue up to 5.3.1 and classified as critical. This vulnerability affects the function devalue.parse. The manipulation with an unknown input leads to a prototype pollution vulnerability. The CWE definition for the vulnerability is CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Svelte devalue is a utility library. Prior to version 5.3.2, a string passed to devalue.parse could represent an object with a __proto__ property and devalue.parse does not check that an index is numeric. This could result in assigning prototypes to objects and properties, leading to prototype pollution. This issue has been fixed in version 5.3.2

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-57820 since 08/20/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version 5.3.2 eliminates this vulnerability. Applying the patch 0623a47c9555b639c03ff1baea82951b2d9d1132 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Prototype pollution
CWE: CWE-1321 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: devalue 5.3.2
Patch: 0623a47c9555b639c03ff1baea82951b2d9d1132

Timelineinfo

08/20/2025 CVE reserved
08/27/2025 +7 days Advisory disclosed
08/27/2025 +0 days VulDB entry created
08/29/2025 +2 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-vj54-72f3-p5jv
Status: Confirmed

CVE: CVE-2025-57820 (🔒)
GCVE (CVE): GCVE-0-2025-57820
GCVE (VulDB): GCVE-100-321520

Entryinfo

Created: 08/27/2025 06:59
Updated: 08/29/2025 22:13
Changes: 08/27/2025 06:59 (69), 08/29/2025 22:13 (1)
Complete: 🔍
Cache ID: 216::103

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