CVE-2021-31852Network attack vector

Session-token theft via unmodified UID parameter reflection

Published Nov 23, 2021 · Updated Aug 3, 2024

Reflected XSS in McAfee Policy Auditor before 6.5.2 allows remote attackers to steal session tokens through a crafted UID parameter. The web interface reflects the UID request value without modification, causing attacker-supplied script or HTML to execute in a user's browser. Exploitation requires user interaction but no attacker authentication, and captured tokens or credentials enable cross-domain requests or access to other security-critical applications.

CVSS severity6.1
Medium
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in McAfee Policy Auditor before 6.5.2 allows remote attackers to steal session tokens through a crafted UID parameter. The web interface reflects the UID request value without modification, causing attacker-supplied script or HTML to execute in a user's browser. Exploitation requires user interaction but no attacker authentication, and captured tokens or credentials enable cross-domain requests or access to other security-critical applications.

The record

CVE
CVE-2021-31852
Published
Nov 23, 2021
Updated
Aug 3, 2024
Vendor
McAfee
Product
McAfee Policy Auditor
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 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=unspecified <6.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

McAfee · McAfee Policy Auditorversion=unspecified <6.5.2

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1TrellixCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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