What is the CVSS score of CVE-2026-13390?

CVE-2026-13390 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2026-13390?

Yes, a public proof-of-concept exploit is available for CVE-2026-13390. Prioritise patching immediately. EPSS: 0.2%.

Is there a patch available for CVE-2026-13390?

Yes, a patch is available for CVE-2026-13390. Update the affected software to the latest version immediately.

The Events Calendar CVE-2026-13390

EUVD-2026-49071 MEDIUM

Missing Authorization (CWE-862)

2026-07-27 WPScan

GHSA-h677-jwp7-x89g

WordPress Authentication Bypass The Events Calendar Unknown

5.3

CVSS 3.1 · Vendor: WPScan

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Vulnerability Assessment

Weakness

CWE

CWE-862

MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Integrity bypass in The Events Calendar WordPress plugin allows unauthenticated attackers to mark existing Event Aggregator import records as failed and insert arbitrary content into a hidden comment. Public exploit code is available, and the vulnerability is automatable via the REST API, increasing the risk beyond the moderate CVSS score.

Affected VersionsENISA

The Events Calendar 0 <6.16.5.1

Affected Packages

euvd the_events_calendar fix: 6.16.5.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (WPScan) PRIMARY 5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Primary rating from Vendor (WPScan) · only source for this CVE.

CVSS VectorVendor: WPScan

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Patch available

Jul 27, 2026 - 07:01 EUVD

CVE Published

Jul 27, 2026 - 06:00 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 27, 2026 - 06:00 cve.org

MEDIUM 5.3

DescriptionCVE.org

The Events Calendar WordPress plugin before 6.16.5.1 does not perform an authorization check on one of its Event Aggregator import REST API routes and skips an integrity check for a particular status value, allowing unauthenticated attackers to mark existing import records as failed and to store arbitrary content in a hidden comment record.

Threat Intelligence Overview

EPSS Score

0.2%

Top 92% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation

Poc

System Exposure· derived

Open

Automatable

Yes

Human Impact· derived

Medium

Technical Impact

Partial

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +26

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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9.8 Sep 12

Remote code execution in The Events Calendar plugin for WordPress (StellarWP) affects all versions up to and including 6

CVE-2024-4180 CRITICAL Act Now POC

9.1 Jun 04

The Events Calendar WordPress plugin before 6.4.0.1 does not properly sanitize user-submitted content when rendering som

CVE-2023-6203 HIGH This Week POC

7.5 Dec 18

The Events Calendar WordPress plugin before 6.2.8.1 discloses the content of password protected posts to unauthenticated

CVE-2026-84740 MEDIUM This Month POC

6.5 Oct 02

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CVE-2024-1295 MEDIUM This Month POC

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9.8 Sep 12

Remote code execution in The Events Calendar WordPress plugin (StellarWP) through version 6.17.3 lets unauthenticated at

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9.8 Oct 07

PHP object injection in The Events Calendar WordPress plugin (all versions through 6.17.4, published by Liquid Web / Ste

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9.8 Aug 24

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The The Events Calendar plugin for WordPress is vulnerable to SQL Injection via the 'order' parameter of the 'tribe_has_

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9.3 Jun 16

Blind SQL injection in The Events Calendar WordPress plugin (versions 6.15.12 through 6.16.2) by Liquid Web / StellarWP

CVE-2024-5333 MEDIUM This Month POC

5.3 Dec 16

The Events Calendar WordPress plugin before 6.8.2.1 is missing access checks in the REST API, allowing for unauthenticat

CVE-2026-84745 LOW Monitor POC

2.7 Sep 05

The Events Calendar WordPress plugin before 6.17.3.1 exposes unpublished site content - drafts, pending posts, and priva

Same weakness CWE-862 – Missing Authorization

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CVE-2023-52163 HIGH POC

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CVE-2017-9232 CRITICAL POC

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CVE-2023-6875 CRITICAL POC

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CVE-2024-4898 CRITICAL POC

9.8

CVE-2023-32117 CRITICAL POC

9.8

CVE-2020-36719 CRITICAL POC

9.8

Same technique Authentication Bypass

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CVE-2015-3306 CRITICAL POC

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CVE-2023-22515 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2013-2465 CRITICAL POC

9.8

CVE-2011-3544 CRITICAL POC

9.8

CVE-2022-40684 CRITICAL POC

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CVE-2025-61882 CRITICAL POC

9.8

CVE-2024-0012 CRITICAL POC

9.3

References

Advisories & patches

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-13390

Search Externally

GitHub PoC

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