VulnerabilityPublished 16 Mar 2026

CVE-2026-32583: Modern Events Calendar (WordPress plugin) · Missing Authorization

Affects Modern Events Calendar (WordPress plugin)Source CVE Database V5

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Not known to be exploited · public detection template (Nuclei) · CVSS 5.3 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Mar 2026
Detectable: evidence found.
nuclei template: Webnus Inc. Modern Events Calendar - Broken Access Control
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Webnus Inc.Modern Events Calendar	Affected ≥ n/a, ≤ 7.29.0	Fixed in–

AI-suggested

Immediately audit and review access control configurations within the Modern Events Calendar plugin to ensure that only authorized users can perform sensitive actions.
Restrict plugin administrative and event modification permissions strictly to trusted users and roles.
Monitor logs for unusual activity related to event creation, modification, or deletion to detect potential exploitation attempts.
Implement web application firewall (WAF) rules to detect and block suspicious requests targeting the plugin endpoints.
Keep abreast of vendor announcements and apply official patches or updates promptly once released.
Consider temporarily disabling or limiting the plugin's functionality if critical until a patch is available.
Employ principle of least privilege across the WordPress environment to minimize the impact of any unauthorized access.
Conduct regular security assessments and penetration testing focused on access control mechanisms within web applications and plugins.
Educate site administrators on the risks of misconfigured permissions and the importance of secure plugin management.

Description

Missing Authorization vulnerability in Webnus Inc. Modern Events Calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Modern Events Calendar: from n/a through 7.29.0.

Impact

The primary impact of CVE-2026-32583 is on data integrity, as unauthorized users can modify event information or configurations within the Modern Events Calendar plugin. This can lead to misinformation, event disruptions, or unauthorized event creation/deletion, potentially damaging organizational reputation and operational reliability. Since the vulnerability does not affect confidentiality or availability, the risk of data leakage or denial of service is low. However, the ease of exploitation without authentication and user interaction increases the likelihood of attacks, especially on publicly accessible websites using the affected plugin. Organizations that rely heavily on event scheduling and public communications through this plugin may experience operational disruptions or loss of trust from users. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, as attackers may develop exploits following public disclosure. The vulnerability could be leveraged in targeted attacks against organizations with high-profile events or sensitive scheduling needs, including educational institutions, event organizers, and businesses using WordPress for event management.

CWE-862Missing Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #4OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
Attack patterns
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

patchstack.com/database/wordpress/plugin/modern-events-calendar/vulnerability/wordpress-modern-events-calendar-plugin-7-29-0-broken-access-control-vulnerability?_s_id=cve (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 16 Mar 2026, 18:21 UTC

Public exploits and detectiona Nuclei detection template

WeaknessesCWE-862

Technical details

References

Community reviews

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