CVE-2021-31159Public exploitNetwork attack vector

User enumeration via inconsistent password-reset errors

Published Jun 16, 2021 · Updated Aug 3, 2024

Information disclosure in ServiceDesk Plus MSP before 10519 allows remote attackers to enumerate valid users through the Forgot Password function. The endpoint returns a different error message when an account exists, allowing submitted usernames to be distinguished from nonexistent accounts; with Active Directory authentication enabled, the same oracle can enumerate directory accounts. The attack requires network access to the password-recovery interface and reveals account existence only, not passwords or direct account control.

CVSS severity5.3
Medium
EPSS probability17.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ServiceDesk Plus MSP before 10519 allows remote attackers to enumerate valid users through the Forgot Password function. The endpoint returns a different error message when an account exists, allowing submitted usernames to be distinguished from nonexistent accounts; with Active Directory authentication enabled, the same oracle can enumerate directory accounts. The attack requires network access to the password-recovery interface and reveals account existence only, not passwords or direct account control.

The record

CVE
CVE-2021-31159
Published
Jun 16, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-209, T1087.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 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?

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

5.0NISTAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NISTCVSS: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-209Exposure of Sensitive Information Through Error Message
T1087.002Domain Account

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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