algoliasearch-helper up to 3.11.1 Search Parameter merge.js _merge prototype pollution

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in algoliasearch-helper up to 3.11.1. This affects the function _merge of the file merge.js of the component Search Parameter Handler. Performing a manipulation results in prototype pollution. This vulnerability is cataloged as CVE-2025-3193. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in algoliasearch-helper up to 3.11.1. This affects the function _merge of the file merge.js of the component Search Parameter Handler. The manipulation with an unknown input leads to a prototype pollution vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

Versions of the package algoliasearch-helper from 2.0.0-rc1 and before 3.11.2 are vulnerable to Prototype Pollution in the _merge() function in merge.js, which allows constructor.prototype to be written even though doing so throws an error. In the "extreme edge-case" that the resulting error is caught, code injected into the user-supplied search parameter may be exeucted. This is related to but distinct from the issue reported in [CVE-2021-23433](https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-1570421). **NOTE:** This vulnerability is not exploitable in the default configuration of InstantSearch since searchParameters are not modifiable by users.

The weakness was shared by CVE-2021-23433 as SNYK-JS-ALGOLIASEARCHHELPER-3318396. The advisory is shared at security.snyk.io. This vulnerability is uniquely identified as CVE-2025-3193 since 04/03/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 3.11.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202509-4280) and EUVD (EUVD-2025-31407). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 7.5
CNA Vector (snyk): 🔒

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: algoliasearch-helper 3.11.2

Timelineinfo

04/03/2025 CVE reserved
09/27/2025 +177 days Advisory disclosed
09/27/2025 +0 days VulDB entry created
10/05/2025 +8 days VulDB entry last update

Sourcesinfo

Advisory: SNYK-JS-ALGOLIASEARCHHELPER-3318396
Researcher: CVE-2021-23433
Status: Confirmed

CVE: CVE-2025-3193 (🔒)
GCVE (CVE): GCVE-0-2025-3193
GCVE (VulDB): GCVE-100-326169
EUVD: 🔒
CNNVD: CNNVD-202509-4280 - algoliasearch-helper 安全漏洞

Entryinfo

Created: 09/27/2025 07:17
Updated: 10/05/2025 02:39
Changes: 09/27/2025 07:17 (66), 09/27/2025 10:40 (1), 09/28/2025 16:01 (6), 10/03/2025 23:42 (11), 10/05/2025 02:39 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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