CVE-2021-20543Network attack vector

Browser content injection via untrusted process templates

Published Jun 24, 2022 · Updated Sep 17, 2024

HTML injection in IBM Jazz Team Server allows remote authenticated users to render injected HTML in a victim's browser through a custom process template. The template upload accepts user-supplied HTML and JavaScript content, and affected releases render certain injected HTML tags in pages without neutralizing them. Administrator access is required to install a template, and exploitation then requires a victim to view its content in the hosting site's security context.

CVSS severity5.4
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in IBM Jazz Team Server allows remote authenticated users to render injected HTML in a victim's browser through a custom process template. The template upload accepts user-supplied HTML and JavaScript content, and affected releases render certain injected HTML tags in pages without neutralizing them. Administrator access is required to install a template, and exploitation then requires a victim to view its content in the hosting site's security context.

The record

CVE
CVE-2021-20543
Published
Jun 24, 2022
Updated
Sep 17, 2024
Vendor
IBM
Product
Jazz Team Server
Classifications
CWE-79, T1204
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=6.0.6
  2. Affected versionversion=6.0.6.1
  3. Affected versionversion=7.0
  4. Affected versionversion=7.0.1
  5. Affected versionversion=7.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Jazz Team Serverversion=6.0.6; version=6.0.6.1; version=7.0; version=7.0.1; version=7.0.2

Published CVSS scores

5.4IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204User 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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