CVE-2017-20056Public exploitNetwork attack vector

Stored script execution via unescaped User-Agent

Published Jun 16, 2022 · Updated Apr 15, 2025

Stored XSS in Weblizar User Login Log 2.2.1 allows remote authenticated users to execute scripts through a crafted User-Agent. The login logger stores the request's User-Agent value and renders it in the WordPress administration log without HTML escaping. A subscriber-level account can submit the header during login, but an administrator must view the poisoned log entry for execution.

CVSS severity3.5
Low
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Weblizar User Login Log 2.2.1 allows remote authenticated users to execute scripts through a crafted User-Agent. The login logger stores the request's User-Agent value and renders it in the WordPress administration log without HTML escaping. A subscriber-level account can submit the header during login, but an administrator must view the poisoned log entry for execution.

The record

CVE
CVE-2017-20056
Published
Jun 16, 2022
Updated
Apr 15, 2025
Vendor
Weblizar
Product
User Login Log
Classifications
CWE-79, CWE-80, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Weblizar · User Login Logversion=2.2.1

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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
3.5NIST NVDAV:N/AC:M/Au:S/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1059.007JavaScript/JScript

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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