VDB-333568 · CVE-2025-9624 · EUVD-2025-199644

OpenSearch up to 3.1.x Query String recursion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in OpenSearch up to 3.1.x and classified as problematic. This issue affects some unknown processing of the component Query String Handler. Executing a manipulation can lead to recursion. This vulnerability appears as CVE-2025-9624. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in OpenSearch up to 3.1.x. This vulnerability affects an unknown code of the component Query String Handler. The manipulation with an unknown input leads to a recursion vulnerability. The CWE definition for the vulnerability is CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in OpenSearch allows attackers to cause Denial of Service (DoS) by submitting complex query_string inputs. This issue affects all OpenSearch versions between 3.0.0 and < 3.3.0 and OpenSearch < 2.19.4.

The weakness was presented by Camilo Vera. The advisory is shared for download at fluidattacks.com. This vulnerability was named CVE-2025-9624 since 08/28/2025. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 276964 (Linux Distros Unpatched Vulnerability : CVE-2025-9624), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.2.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (276964), EUVD (EUVD-2025-199644) and CERT Bund (WID-SEC-2025-2680). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Open Source OpenSearch

Productinfo

Name

OpenSearch

Version

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: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Recursion
CWE: CWE-674 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 276964
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-9624

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenSearch 3.2.0

Timelineinfo

08/28/2025 CVE reserved
11/26/2025 +90 days Advisory disclosed
11/26/2025 +0 days VulDB entry created
12/15/2025 +19 days VulDB entry last update

Sourcesinfo

Advisory: fluidattacks.com
Researcher: Camilo Vera
Status: Confirmed

CVE: CVE-2025-9624 (🔒)
GCVE (CVE): GCVE-0-2025-9624
GCVE (VulDB): GCVE-100-333568
EUVD: 🔒
CERT Bund: WID-SEC-2025-2680 - OpenSearch: Schwachstelle ermöglicht Denial of Service

Entryinfo

Created: 11/26/2025 06:45
Updated: 12/15/2025 16:47
Changes: 11/26/2025 06:45 (66), 11/26/2025 17:50 (7), 12/02/2025 16:54 (11), 12/02/2025 17:40 (2), 12/03/2025 00:43 (1), 12/15/2025 16:47 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.