CVE-2021-20737Network attack vector

Authenticated viewing of unauthorized pages

Published Jun 22, 2021 · Updated Aug 3, 2024

Improper authentication in WESEEK GROWI before 4.2.20 allows remote authenticated users to view pages outside their access privileges. WESEEK and JVN do not identify the affected route or explain which authentication or authorization operation fails. A valid login is required, and the documented consequence is read-only disclosure of otherwise unauthorized page content.

CVSS severity6.5
Medium
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in WESEEK GROWI before 4.2.20 allows remote authenticated users to view pages outside their access privileges. WESEEK and JVN do not identify the affected route or explain which authentication or authorization operation fails. A valid login is required, and the documented consequence is read-only disclosure of otherwise unauthorized page content.

The record

CVE
CVE-2021-20737
Published
Jun 22, 2021
Updated
Aug 3, 2024
Vendor
WESEEK, Inc.
Product
GROWI
Classifications
CWE-287, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=versions prior to v4.2.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WESEEK, Inc. · GROWIversion=versions prior to v4.2.20

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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