CVE-2021-27781Network attack vector

Browser cookie access via stored script injection

Published May 27, 2022 · Updated Sep 16, 2024

Stored cross-site scripting in HCL BigFix Mobile and Modern Client Management 2.0 allows remote authenticated users to access browser cookies. A Master operator can embed a script tag in HTML that executes when the stored content is rendered; HCL has not identified the affected field or handler. Master operator privileges are required, and the demonstrated consequence is script execution with access to cookies in the rendering browser.

CVSS severity6.6
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in HCL BigFix Mobile and Modern Client Management 2.0 allows remote authenticated users to access browser cookies. A Master operator can embed a script tag in HTML that executes when the stored content is rendered; HCL has not identified the affected field or handler. Master operator privileges are required, and the demonstrated consequence is script execution with access to cookies in the rendering browser.

The record

CVE
CVE-2021-27781
Published
May 27, 2022
Updated
Sep 16, 2024
Vendor
HCL Software
Product
BigFix Mobile and Modern Client Management
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

HCL Software · BigFix Mobile and Modern Client Managementversion=2.0

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
6.6HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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