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CVE-2023-25806

18
FAUCET Score

CVE-2023-25806 is a timing-based user enumeration vulnerability affecting OpenSearch Security plugin versions prior to 1.3.9 and 2.6.0, specifically when using the internal basic identity provider. Attackers can discern valid usernames by observing differences in authentication response times. Rated Medium (CVSS 5.3), this vulnerability allows an unauthenticated attacker to gain sensitive information (user enumeration) with low attack complexity, but does not impact integrity or availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.9CPE matchmatch criteria
cpe:2.3:a:amazon:opensearch:*:*:*:*:*:docker:*:*
>= 2.0.0, < 2.6.0CPE matchmatch criteria
cpe:2.3:a:amazon:opensearch:*:*:*:*:*:docker:*:*
< 1.3.9CPE matchmatch criteria
cpe:2.3:a:amazon:opensearch_security:*:*:*:*:*:opensearch:*:*
>= 2.0.0, < 2.6.0CPE matchmatch criteria
cpe:2.3:a:amazon:opensearch_security:*:*:*:*:*:opensearch:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 15th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.opensearch.plugin:opensearch-securityFixed in: 1.3.9
mavenpatch availablevia ghsa
Product: org.opensearch.plugin:opensearch-securityFixed in: 2.6.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

mavenGHSA-c6wg-cm5x-rqvjmedium

OpenSearch has time discrepancy in authentication responses

Mar 7, 2023

References

github.com / opensearch-project/security/security/advisories/GHSA-c6wg-cm5x-rqvj
Vendor Advisory