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CVE-2017-8438

27
FAUCET Score

CVE-2017-8438 is a privilege escalation vulnerability affecting Elastic X-Pack Security versions 5.0.0 to 5.4.0, specifically within its "run_as" functionality. This flaw allows an authenticated attacker to bypass intended user transitions, potentially gaining elevated privileges if roles are configured with user templates or if the specified run_as user does not exist. With a CVSS score of 8.8 (HIGH), the vulnerability is network-exploitable with low attack complexity, posing high impacts to confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.0.0CPE matchmatch criteria
cpe:2.3:a:elastic:x-pack:5.0.0:*:*:*:*:*:*:*
5.0.1CPE matchmatch criteria
cpe:2.3:a:elastic:x-pack:5.0.1:*:*:*:*:*:*:*
5.0.2CPE matchmatch criteria
cpe:2.3:a:elastic:x-pack:5.0.2:*:*:*:*:*:*:*
5.1.0CPE matchmatch criteria
cpe:2.3:a:elastic:x-pack:5.1.0:*:*:*:*:*:*:*
5.1.1CPE matchmatch criteria
cpe:2.3:a:elastic:x-pack:5.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 56th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

discuss.elastic.co / t/elastic-stack-5-4-1-and-5-3-3-security-updates/87952
Vendor Advisory
elastic.co / blog/elasticsearch-5-4-1-and-5-3-3-released
PatchVendor Advisory
elastic.co / community/security
Vendor Advisory