CVE-2024-53843Network attack vector

Browser script execution via reflected URL parameters

Published Nov 25, 2024 · Updated Nov 26, 2024

Reflected XSS in DapperDuckling Keycloak Connector before 2.5.5 allows remote attackers to run JavaScript via crafted login URLs. The authentication flow copies insufficiently sanitized URL parameters into an HTML response, causing browser interpretation as executable script. Exploitation requires a victim to visit an attacker-crafted link, and successful script runs in the affected application's browser origin.

CVSS severity8.1
High
EPSS probability0.51%
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 DapperDuckling Keycloak Connector before 2.5.5 allows remote attackers to run JavaScript via crafted login URLs. The authentication flow copies insufficiently sanitized URL parameters into an HTML response, causing browser interpretation as executable script. Exploitation requires a victim to visit an attacker-crafted link, and successful script runs in the affected application's browser origin.

The record

CVE
CVE-2024-53843
Published
Nov 25, 2024
Updated
Nov 26, 2024
Vendor
DapperDuckling
Product
Keycloak Connector
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 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=< 2.5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DapperDuckling · Keycloak Connectorversion=< 2.5.5

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
6.2OSVCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

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')
T1189Drive-by Compromise

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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