CVE-2021-28656Network attack vector

Credential actions via forged cross-site requests

Published Apr 9, 2024 · Updated Feb 13, 2025

CSRF in Apache Zeppelin 0.9.0 and earlier allows remote attackers to submit Credential-page requests through a victim's browser. The Credential page accepts malicious cross-site requests, but Apache has not disclosed whether token, origin, or another request validation is missing. Exploitation requires a victim with a browser session that can reach Zeppelin; Apache has not specified which credential operation the forged request performs.

CVSS severity5.4
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Apache Zeppelin 0.9.0 and earlier allows remote attackers to submit Credential-page requests through a victim's browser. The Credential page accepts malicious cross-site requests, but Apache has not disclosed whether token, origin, or another request validation is missing. Exploitation requires a victim with a browser session that can reach Zeppelin; Apache has not specified which credential operation the forged request performs.

The record

CVE
CVE-2021-28656
Published
Apr 9, 2024
Updated
Feb 13, 2025
Vendor
The Apache Software Foundation
Product
Apache Zeppelin
Classifications
CWE-352, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Zeppelinversion=0 <=0.9.0

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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