5.3

CVE-2025-20384: splunk Improper Output Neutralization for Logs

CVSS: 5.3v3.1MediumAnalyzed
Published 03-12-2025Last modified 03-12-2025
Open JSON

Vulnerability summary

CVE-2025-20384 is a medium (CVSS 5.3) Improper Output Neutralization for Logs vulnerability in splunk. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.1% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-12-2025
    PublishedVulnerability first disclosed.
  2. 03-12-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

0.00 pp

From 0.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Splunk3 products
  • splunk≥ 9.2.0, < 9.2.10 | ≥ 9.3.0, < 9.3.8 | ≥ 9.4.0, < 9.4.6 | 10.0.0
  • splunk_cloud_platform≥ 9.3.2411, < 9.3.2411.117 | ≥ 10.0.2503, < 10.0.2503.6 | ≥ 10.1.2507, < 10.1.2507.4
  • splunk enterprise≥ 10.0, < 10.0.1 | ≥ 9.4, < 9.4.6 | ≥ 9.3, < 9.3.8 | ≥ 9.2, < 9.2.10

1 vendor · 3 products

References

1 links