VulnerabilityModified

CVE-2025-9624

A vulnerability in OpenSearch allows attackers to cause Denial of Service (DoS) by submitting complex query_string inputs.

HIGH 8.3EPSS 0.51%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 4.0: 8.3 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.51% probability · 42th percentile
CISA KEV: Not listed
Weakness: CWE-674
Affected: amazon/opensearch
Source: help@fluidattacks.com

References

https://fluidattacks.com/advisories/chickExploit, Third Party Advisory
https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.4
https://github.com/opensearch-project/OpenSearch/releases/tag/3.3.0

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.