CVE-2020-1941Public exploitNetwork attack vector

Browser script execution via unescaped message header

Published May 14, 2020 · Updated Aug 4, 2024

Cross-site scripting in Apache ActiveMQ 5.0.0 through 5.15.11 allows remote attackers to run script in an administrator's browser. The WebConsole queue-content view builds a message title from a JMS header and renders the header value as HTML without context-appropriate escaping. Exploitation requires a crafted message to reach a queue and an administrator to open its contents; the script then runs in that WebConsole session.

CVSS severity6.1
Medium
EPSS probability6.21%
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 Apache ActiveMQ 5.0.0 through 5.15.11 allows remote attackers to run script in an administrator's browser. The WebConsole queue-content view builds a message title from a JMS header and renders the header value as HTML without context-appropriate escaping. Exploitation requires a crafted message to reach a queue and an administrator to open its contents; the script then runs in that WebConsole session.

The record

CVE
CVE-2020-1941
Published
May 14, 2020
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache ActiveMQ
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=Apache ActiveMQ 5.0.0 to 5.15.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache ActiveMQversion=Apache ActiveMQ 5.0.0 to 5.15.11

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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

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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