Unauthorized access to documents in data streams with specially crafted requests

published 2025-12-01 11 mo ago modified 2026-10-18 21 d ago also EUVD-2025-200071

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits: 0; none known

In Search Guard FLX versions from 3.1.0 up to 4.0.0 with enterprise modules being disabled, there exists an issue which allows authenticated users to use specially crafted requests to read documents from data streams without having the respective privileges.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 11 mo ago (2025-12-01)

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

floragunn Search Guard FLX

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-863 Incorrect Authorization

References

Sources

CVE List CVE-2025-13653
NVD CVE-2025-13653

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary