CVE-2021-42250Network attack vector

Log forgery via invalid redirect URL logging

Published Nov 17, 2021 · Updated Aug 4, 2024

Log injection in Apache Superset 1.3.1 and earlier allows remote authenticated users to forge log entries through a crafted redirect URL. The URL shortener endpoint logs the attacker-controlled data form value when URL validation fails, allowing embedded line breaks or other content to create deceptive records. Any authenticated user who can submit to this endpoint can corrupt log integrity, but the flaw does not disclose data or interrupt service.

CVSS severity7.1
High
EPSS probability1.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Log injection in Apache Superset 1.3.1 and earlier allows remote authenticated users to forge log entries through a crafted redirect URL. The URL shortener endpoint logs the attacker-controlled data form value when URL validation fails, allowing embedded line breaks or other content to create deceptive records. Any authenticated user who can submit to this endpoint can corrupt log integrity, but the flaw does not disclose data or interrupt service.

The record

CVE
CVE-2021-42250
Published
Nov 17, 2021
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Superset
Classifications
CWE-116, T1070
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=Apache Superset <=1.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Supersetversion=Apache Superset <=1.3.1

Published CVSS scores

6.5GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
7.1GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1070Indicator Removal

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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