CVE-2016-20070Public exploitNetwork attack vectorHinoki check available

Administrator script execution via unchecked option updates

Published Jun 15, 2026 · Updated Jun 15, 2026

Stored XSS in CodePeople Booking Calendar Contact Form 1.0.23 and earlier allows remote authenticated users to run script in administrator browsers. Plugin option, season-price, and booking-management handlers accept subscriber-controlled fields without capability checks and store them without output-safe sanitization. A subscriber account is sufficient; an administrator who later opens the affected settings or booking data executes the stored payload in the site's origin.

CVSS severity6.4
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in CodePeople Booking Calendar Contact Form 1.0.23 and earlier allows remote authenticated users to run script in administrator browsers. Plugin option, season-price, and booking-management handlers accept subscriber-controlled fields without capability checks and store them without output-safe sanitization. A subscriber account is sufficient; an administrator who later opens the affected settings or booking data executes the stored payload in the site's origin.

The record

CVE
CVE-2016-20070
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
CodePeople
Product
Booking Calendar Contact Form
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 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=0 <=1.0.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CodePeople · Booking Calendar Contact Formversion=0 <=1.0.23

Published CVSS scores

5.1VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.4VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
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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