Vulnerability Report

CVE-2026-20254

Title: Credential Exfiltration via CSS Injection in Dashboard

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2026-20254.

CWE Category CWE-20

Published Date Jun 10, 2026

Modified Date Jun 15, 2026

Exploit Status Not Found

Score 5.7 CVSS v3.1

Exploit Probability (EPSS)

0.25%

Vulnerability Summary

CVE-2026-20254: In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could craft a malicious classic dashboard that exfiltrates sensitive data to an external server when a higher-privileged user views it, bypassing the external content restriction through a Cascading Style Sheets (CSS) injection.<br><br>The Trusted Domains security check does not fully validate inline style attribute values, which can allow for outbound requests to untrusted domains and credential exfiltration when a victim views a crafted dashboard.

Impacted Vendors

splunk 2

jenkins 1

Reference Links

https://advisory.splunk.com/advisories/SVD-2026-0604

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.7

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

REQUIRED

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-20254 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 15, 2026 MODIFIED

Vulnerability data updated via NVD.

June 10, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction REQUIRED

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Affected Stack

No specific products linked.