CVE-2026-78159Network attack vectorHinoki check available

Unauthenticated code execution via widget callable invocation

Published Sep 12, 2026 · Updated Sep 12, 2026

Code injection in The Events Calendar 6.17.3 and earlier allows remote attackers to execute server code through crafted legacy-widget blocks. A plain-array widget classes map bypasses is_safe_widget_instance() and reaches the callable sink in Element_Classes::parse_array(). Exploitation requires comments on tribe_events posts and a submitted comment containing the crafted block; processing the event page then runs attacker-selected code.

CVSS severity9.8
Critical
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Code injection in The Events Calendar 6.17.3 and earlier allows remote attackers to execute server code through crafted legacy-widget blocks. A plain-array widget classes map bypasses is_safe_widget_instance() and reaches the callable sink in Element_Classes::parse_array(). Exploitation requires comments on tribe_events posts and a submitted comment containing the crafted block; processing the event page then runs attacker-selected code.

The record

CVE
CVE-2026-78159
Published
Sep 12, 2026
Updated
Sep 12, 2026
Vendor
Liquid Web
Product
The Events Calendar
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 <=6.17.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Liquid Web · The Events Calendarversion=0 <=6.17.3

Published CVSS scores

9.8Wordfence IntelligenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

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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