CVE-2021-26598Public exploitNetwork attack vector

Unauthenticated user disclosure via reusable security tokens

Published Mar 28, 2022 · Updated Aug 3, 2024

Incorrect access control in ImpressCMS before 1.4.3 allows remote attackers to disclose CMS user information through findusers.php. The endpoint treats any valid security token as authorization, although unauthenticated pages such as misc.php issue those tokens without establishing a user session. Possession of such a token exposes otherwise restricted user-search functionality and associated CMS user information.

CVSS severity5.3
Medium
EPSS probability10.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in ImpressCMS before 1.4.3 allows remote attackers to disclose CMS user information through findusers.php. The endpoint treats any valid security token as authorization, although unauthenticated pages such as misc.php issue those tokens without establishing a user session. Possession of such a token exposes otherwise restricted user-search functionality and associated CMS user information.

The record

CVE
CVE-2021-26598
Published
Mar 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

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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