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CVE-2025-20384

INDEX BUILT · 2026-09-20

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Unauthenticated Log Injection in Splunk Enterprise

CVE-2025-203844 of 4 sources documented this
35

rank 35 = 15 + 13 + 0 + 7 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.00385  ·  without this subject the record ranks 20

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 5.3, from the CNA  ·  without this subject the record ranks 22

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 35

How much of the world it touches

NVD CPE configurations

7 products in the CPE ranges  ·  without this subject the record ranks 28

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 35

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$4,620over the next 30 days, if this record is yours
Movementno material movementthe record holds only daily drift and scoring model releases
Basisassumeda published average, not your estate

$4,620 = $4.99M incident cost x 0.24048551839932833 exposure x 0.00385 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.00385EPSSNOT IN KEVas of 2026-09-20
Severity5.3 MEDIUMreceipt
Harmunauthenticated · networkreceipt
Exploitationpublic proof-of-conceptreceipt
Defensefix version namedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2025-12-04, 239 days at 0.00, as of 2026-07-31. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactPartial integrity lossreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-117 Improper Output Neutralization for Logsreceipt
Published consequencesCWE-117: Integrity, Confidentiality, Availability, Non-Repudiation: Modify Application Data, Hide Activities, Execute Unauthorized Code or Commands[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed in10.0.1; 9.4.6; 9.3.8; 9.2.10; 10.1.2507.4; 10.0.2503.6; 9.3.2411.117receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Proof-of-concept published · 1 public repository, 2025-12-07.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 1 public repository2025-12-07receipt
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA5.3 MEDIUMreceipt
Exploit probability0.00385 · top 68% of all CVEsreceipt
Blast breadth2 products across 1 vendorderived
Assigned byciscoreceipt
Recorded changes16 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productSplunk Enterprise; Splunk Cloud Platformreceipt
Published rangessplunk >= 9.2.0 < 9.2.10; splunk >= 9.3.0 < 9.3.8; splunk >= 9.4.0 < 9.4.6; splunk 10.0.0receipt
Show all 7 published ranges
splunk >= 9.2.0 < 9.2.10
splunk >= 9.3.0 < 9.3.8
splunk >= 9.4.0 < 9.4.6
splunk 10.0.0
splunk cloud platform >= 9.3.2411 < 9.3.2411.117
splunk cloud platform >= 10.0.2503 < 10.0.2503.6
splunk cloud platform >= 10.1.2507 < 10.1.2507.4
Fixed in10.0.1; 9.4.6; 9.3.8; 9.2.10; 10.1.2507.4; 10.0.2503.6; 9.3.2411.117receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

In Splunk Enterprise versions below 10.0.1, 9.4.6, 9.3.8, and 9.2.10, and Splunk Cloud Platform versions below 10.1.2507.4, 10.0.2503.6, and 9.3.2411.117.125, an unauthenticated attacker can inject American National Standards Institute (ANSI) escape codes into Splunk log files due to improper validation at the /en-US/static/ web endpoint. This may allow them to poison, forge, or obfuscate sensitive log data through specially crafted HTTP requests, potentially impacting log integrity and detection capabilities. receipt

NVD's analysis a second authority

weakness
CWE-117
affected versions
splunk >= 9.2.0 < 9.2.10; splunk >= 9.3.0 < 9.3.8; splunk >= 9.4.0 < 9.4.6; and 4 more, listed in full below
also scored by
[email protected] 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

check it yourself advisory.splunk.com receipt

Movement the material steps

4 Dec 20250.00074
15 Jun 20260.00339 · scoring model v2026.06.15
31 Jul 20260.00385
Show all 13 observations
4 Dec 20250.00074
6 Dec 20250.00033
9 Dec 20250.00043
4 Jan 20260.00066
23 Jan 20260.0006
9 Feb 20260.00063
4 Apr 20260.00098
1 May 20260.00059
2 May 20260.0008
13 May 20260.00118
15 Jun 20260.00339
2 Jul 20260.00352
31 Jul 20260.00385

13 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.00385Published2025-12-03Public PoC2025-12-07Index as of2026-07-31

The record had been public for 7 months when this index was last written.

Published 2025-12-03 receipt · Public PoC 2025-12-07 receipt · Index as of 2026-07-31 derived

Siblings and hubs

Records related to this one

Its defect family

splunk enterprise

Of the 2 records in this family, this is the only one holding an assigning CNA: cisco.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Family membership: held values

This record is one of a group, and the group's page describes all of them. This page is kept and dated, and the defect family's own page is the one we offer for indexing: the whole group.

Browse the index from here

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What usually comes next

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