CVE-2023-5896Network attack vector

Stored XSS via unescaped user group labels

Published Nov 1, 2023 · Updated Feb 27, 2025

Stored XSS in PKP Web Application Library before 3.4.0-4 allows remote authenticated users to run script in an administrator's browser. ReportForm.php passes each localized user-group name from getLocalizedName() into an export-form label without HTML encoding. An administrator able to rename user groups can store a payload that executes when the user-list export form is viewed, exposing page-accessible data.

CVSS severity5.4
Medium
EPSS probability0.34%
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 PKP Web Application Library before 3.4.0-4 allows remote authenticated users to run script in an administrator's browser. ReportForm.php passes each localized user-group name from getLocalizedName() into an export-form label without HTML encoding. An administrator able to rename user groups can store a payload that executes when the user-list export form is viewed, exposing page-accessible data.

The record

CVE
CVE-2023-5896
Published
Nov 1, 2023
Updated
Feb 27, 2025
Vendor
Public Knowledge Project
Product
PKP Web Application Library
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 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=unspecified <3.4.0-4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Public Knowledge Project · PKP Web Application Libraryversion=unspecified <3.4.0-4

Published CVSS scores

2.7@huntrdevCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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