CVE-2020-8160Network attack vector

Browser script execution via unescaped URL path

Published Jan 6, 2021 · Updated Aug 4, 2024

Reflected cross-site scripting in Mendix SSO 2.1.1 and earlier allows remote attackers to execute JavaScript in a victim's browser via a crafted URL path. The OpenID handler reflects user-controlled path data into its response without HTML escaping or output encoding. Exploitation requires a victim to follow the crafted URL, after which the payload runs in that browser under the affected application's origin.

CVSS severity6.1
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected cross-site scripting in Mendix SSO 2.1.1 and earlier allows remote attackers to execute JavaScript in a victim's browser via a crafted URL path. The OpenID handler reflects user-controlled path data into its response without HTML escaping or output encoding. Exploitation requires a victim to follow the crafted URL, after which the payload runs in that browser under the affected application's origin.

The record

CVE
CVE-2020-8160
Published
Jan 6, 2021
Updated
Aug 4, 2024
Vendor
Mendix
Product
Mendix SSO
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 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?

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

  1. Affected versionversion=2.1.1 and lower

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mendix · Mendix SSOversion=2.1.1 and lower

Published CVSS scores

6.1NVDCVSS: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

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.

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Technologies

Your stack

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Your stack

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