CVE-2021-42641Network attack vector

Unauthenticated username and email disclosure via IDOR

Published Feb 2, 2022 · Updated Jul 9, 2026

Insecure Direct Object Reference in PrinterLogic Web Stack 19.1.1.13 SP9 and earlier allows remote attackers to disclose all usernames and email addresses. The web stack exposes user records when an unauthenticated request references another user object, returning username and email fields. No login or user interaction is required, so any network-reachable affected deployment can leak the directory of users without changing data or interrupting service.

CVSS severity7.5
High
EPSS probability2.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure Direct Object Reference in PrinterLogic Web Stack 19.1.1.13 SP9 and earlier allows remote attackers to disclose all usernames and email addresses. The web stack exposes user records when an unauthenticated request references another user object, returning username and email fields. No login or user interaction is required, so any network-reachable affected deployment can leak the directory of users without changing data or interrupting service.

The record

CVE
CVE-2021-42641
Published
Feb 2, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-668, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 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-668Exposure of Resource to Wrong Sphere
T1087Account Discovery

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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