Live Exposure Defense: From CVE to Confirmed Exposure in 12 Hours – See more

Back
New CVE Detected

CVE-2026-57705 – Unauthenticated Authorization Bypass – WordPress Event Tickets Plugin (≤ 5.28.5)

Be the first to know when new zero-days emerge:

Subscribe to Email Alerts
Subscribe to RSS Feed

Summary

CVE-2026-57705 is a Missing Authorization vulnerability in the WordPress Event Tickets plugin by Nexcess, affecting all versions up to and including 5.28.5. Rated HIGH with a CVSS v3.1 score of 7.5, the flaw allows unauthenticated, remote attackers to exploit incorrectly configured access control security levels — enabling unauthorized integrity-impacting actions against affected WordPress installations without any credentials or user interaction. A patched version (5.28.5.1) has been released and immediate upgrade is strongly recommended.

Technical details

  • Root cause: Missing authorization checks on one or more plugin endpoints, classified under CWE-862 (Missing Authorization). The access control configuration for certain plugin functions does not enforce adequate capability or permission verification.
  • Trigger conditions: The vulnerability can be triggered remotely over the network with no prior authentication, no special configuration, and no user interaction required. Attack complexity is low.
  • Attack vector: Network-accessible (HTTP/HTTPS). Any unauthenticated actor able to reach the WordPress site can send a crafted request targeting the vulnerable endpoint.
  • Impact: High integrity impact (CVSS I:H) — successful exploitation enables unauthorized modification or write actions on the affected WordPress instance. There is no confidentiality or availability impact per the CVSS scoring (C:N / A:N).

Affected software

  • WordPress Event Tickets plugin (by Nexcess / The Events Calendar): all versions from initial release through 5.28.5 (inclusive)

Severity

  • CVSS v3.1 Base Score: 7.5 (HIGH)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Mitigation and recommended actions

  • Immediate: Update the Event Tickets plugin to version 5.28.5.1 or later. The vendor released 5.28.5.1 on June 29, 2026, addressing this vulnerability. The current latest version as of this post is 5.29.0.1 (released July 10, 2026) and is also patched. Update via the WordPress admin dashboard under Plugins → Installed Plugins, or download directly from the WordPress.org plugin repository.
  • If immediate patching is not possible: Restrict public access to WordPress administrative and plugin REST API endpoints at the network or WAF layer as a temporary control until the update can be applied. Monitor for unexpected POST requests to plugin-related routes.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report

How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report
Close

Subscribe to Threat Center RSS

Copy/paste the link below into your preferred RSS reader or follow these instructions to subscribe to Slack alerts.

Open RSS feedSlack setup instructions

Close

Get Real-Time CVE Alerts to Your Email

Be the first to know when new zero-days emerge