CVE-2023-23971Network attack vector

Stored script execution through administrator-supplied content

Published Apr 6, 2023 · Updated Apr 28, 2026

Stored XSS in CodePeople WP Time Slots Booking Form 1.1.81 and earlier allows remote authenticated users to inject scripts. Patchstack identifies persistent script injection in the plugin but does not disclose the affected field, handler, or missing output-encoding operation. Administrator privileges and a subsequent visitor action are required, after which the stored payload executes in the visitor's browser and can alter page content or access data available to that session.

CVSS severity5.9
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 CodePeople WP Time Slots Booking Form 1.1.81 and earlier allows remote authenticated users to inject scripts. Patchstack identifies persistent script injection in the plugin but does not disclose the affected field, handler, or missing output-encoding operation. Administrator privileges and a subsequent visitor action are required, after which the stored payload executes in the visitor's browser and can alter page content or access data available to that session.

The record

CVE
CVE-2023-23971
Published
Apr 6, 2023
Updated
Apr 28, 2026
Vendor
CodePeople
Product
WP Time Slots Booking Form
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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=n/a <=1.1.81 changes=[{"at":"1.1.82","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

CodePeople · WP Time Slots Booking Formversion=n/a <=1.1.81 changes=[{"at":"1.1.82","status":"unaffected"}]

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
CAPEC-592Stored XSS
T1059.007JavaScript/JScript

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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