CVE-2020-17453Public exploitNetwork attack vector

Browser script execution via unencoded msgId parameter

Published Apr 5, 2021 · Updated Aug 4, 2024

Reflected XSS in the WSO2 Management Console through 5.10 allows remote attackers to run script in a victim's browser via msgId. The carbon/admin/login.jsp page places the msgId request parameter into its response without the OWASP output encoding added by the vendor's patch. An unauthenticated request still requires a victim to load the crafted response; script can redirect the browser, alter the page, or read browser data, but protected session cookies prevent session hijacking.

CVSS severity6.1
Medium
EPSS probability26.22%
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 the WSO2 Management Console through 5.10 allows remote attackers to run script in a victim's browser via msgId. The carbon/admin/login.jsp page places the msgId request parameter into its response without the OWASP output encoding added by the vendor's patch. An unauthenticated request still requires a victim to load the crafted response; script can redirect the browser, alter the page, or read browser data, but protected session cookies prevent session hijacking.

The record

CVE
CVE-2020-17453
Published
Apr 5, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2021CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1WSO2CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS: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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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