CVE-2023-5167Public exploitNetwork attack vector

Stored XSS via unescaped recorded User-Agent

Published Oct 16, 2023 · Updated Apr 23, 2025

Stored XSS in Solwin Infotech User Activity Log Pro before 2.3.4 allows remote attackers to execute scripts through a User-Agent header. The plugin records an untrusted User-Agent and renders it in the activity-log dashboard without sanitization or output escaping. The User Agent logging setting must be enabled, and script execution occurs when an administrator opens the poisoned log page.

CVSS severity5.4
Medium
EPSS probability0.39%
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 Solwin Infotech User Activity Log Pro before 2.3.4 allows remote attackers to execute scripts through a User-Agent header. The plugin records an untrusted User-Agent and renders it in the activity-log dashboard without sanitization or output escaping. The User Agent logging setting must be enabled, and script execution occurs when an administrator opens the poisoned log page.

The record

CVE
CVE-2023-5167
Published
Oct 16, 2023
Updated
Apr 23, 2025
Vendor
Solwin Infotech
Product
User Activity Log Pro
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=0 <2.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Solwin Infotech · User Activity Log Proversion=0 <2.3.4

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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')
T1203Exploitation for Client Execution

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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