CVE-2021-22936Network attack vector

Administrator-targeted script execution via unsanitized parameter

Published Aug 16, 2021 · Updated Aug 3, 2024

Cross-site scripting in Pulse Connect Secure before 9.1R12 allows remote attackers to execute script in an administrator's browser. The web interface fails to sanitize an unspecified web parameter before rendering it in administrator-facing content. Exploitation requires interaction by an authenticated administrator; public sources do not identify the affected endpoint or parameter.

CVSS severity6.1
Medium
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Pulse Connect Secure before 9.1R12 allows remote attackers to execute script in an administrator's browser. The web interface fails to sanitize an unspecified web parameter before rendering it in administrator-facing content. Exploitation requires interaction by an authenticated administrator; public sources do not identify the affected endpoint or parameter.

The record

CVE
CVE-2021-22936
Published
Aug 16, 2021
Updated
Aug 3, 2024
Vendor
Pulse Secure
Product
Pulse Connect Secure
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Fixed in 9.1R12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pulse Secure · Pulse Connect Secureversion=Fixed in 9.1R12

Published CVSS scores

6.1NIST NVDCVSS: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')
T1203Exploitation for Client Execution

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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