Sigma rule: Potential Exploitation of CVE-2025-4427/4428 Ivanti EPMM Pre-Auth RCE

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-fb41648079bb, updated 2025-05-20T00:00:00.000Z.

Rule

Title
Potential Exploitation of CVE-2025-4427/4428 Ivanti EPMM Pre-Auth RCE
Status
experimental
Level
high
Author
Swachchhanda Shrawan Poudel (Nextron Systems)
Date
2025-05-20
File
rules-emerging-threats/2025/Exploits/CVE-2025-4427/web_invanti_epmm_cve_2025_4427_and_cve_2025_4428.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects potential exploitation of a chained vulnerability attack targeting Ivanti EPMM 12.5.0.0.
CVE-2025-4427 allows unauthenticated access to protected API endpoints via an authentication bypass,
which can then be leveraged to trigger CVE-2025-4428 — a remote code execution vulnerability through
template injection. This sequence enables unauthenticated remote code execution, significantly increasing
the impact of exploitation.

Log source

category
webserver

Detection

selection_uri:
    cs-uri-stem|contains: '/mifs/rs/api/v2/featureusage'
    cs-uri-query|contains: 'format='
selection_exploit_rce:
    - cs-uri-query|contains|all:
          - 'java.lang.Runtime'
          - '.getMethod'
          - 'getRuntime'
          - '.exec('
    - cs-uri-query|contains|all:
          - 'java%2elang%2eRuntime' # java.lang.Runtime
          - '%2egetMethod' # .getMethod
          - '%2eexec%28' # .exec(
    - cs-uri-query|contains:
          - '%6a%61%76%61%2e%6c%61%6e%67%2e%52%75%6e%74%69%6d%65%65%28%29' # java.lang.Runtime
          - '%67%65%74%52%75%6e%74%69%6d%65' # getRuntime
          - '%2e%65%78%65%63%28' # .exec(
selection_exploit_template_injection:
    cs-uri-query|contains:
        - '{7*7}'
        - '%7B7*7%7D'
        - '%7b7%2a7%7d'
condition: selection_uri and 1 of selection_exploit_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access
  • attack.t1190
  • attack.execution
  • attack.t1203
  • cve.2025-4427
  • cve.2025-4428
  • detection.emerging-threats

CVEs this rule names

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Exploits/CVE-2025-4427/web_invanti_epmm_cve_2025_4427_and_cve_2025_4428.yml

Sources and licences

  • SigmaHQ

    "Potential Exploitation of CVE-2025-4427/4428 Ivanti EPMM Pre-Auth RCE" by Swachchhanda Shrawan Poudel (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Exploits/CVE-2025-4427/web_invanti_epmm_cve_2025_4427_and_cve_2025_4428.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential Exploitation of CVE-2025-4427/4428 Ivanti EPMM Pre-Auth RCE",
entity page, dataset version ref-fb41648079bb, updated 2025-05-20T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/41956f7c-7a6b-46d6-b6bb-da6eb2e83fbe (accessed 2026-11-03).
Underlying source: SigmaHQ rule 41956f7c-7a6b-46d6-b6bb-da6eb2e83fbe, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.