Security readout for executives and security teams
Plain-English summary
CVE-2026-23549 is a critical vulnerability in the WordPress WpEvently / mage-eventpress plugin through version 5.1.1. It involves unsafe handling of serialized data, which can allow PHP object injection. For affected public WordPress sites, the business concern is potential full compromise of confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any business-critical WordPress site using WpEvently. The severity is critical, exploitation requires no authentication per CVSS, and no confirmed fixed version is present in the provided sources. Immediate inventory and containment decisions are warranted.
Technical view
The CVE describes CWE-502 deserialization of untrusted data in magepeopleteam WpEvently mage-eventpress. CVSS 3.1 is 9.8: network-accessible, low complexity, no privileges, and no user interaction. Public sources identify affected versions as WpEvently through 5.1.1. The provided sources do not name a fixed version.
Likely exposure
Exposure is likely limited to WordPress installations running the WpEvently / mage-eventpress plugin at version 5.1.1 or earlier. Internet-facing WordPress sites are the highest priority to check because the CVSS vector indicates network attackability without authentication.
Exploitation context
The source bundle does not show CISA KEV listing, confirmed active exploitation, or public exploit details. However, the vulnerability class and CVSS vector indicate high exploitation potential if reachable and if a vulnerable plugin version is installed.
Researcher notes
Evidence is limited to the CVE record and Patchstack database reference. The affected range is through 5.1.1, but the bundle’s affected object has sparse version metadata. No exploit status, patch version, or detailed attack preconditions are provided in the supplied public sources.
Mitigation direction
- Inventory WordPress sites for the WpEvently / mage-eventpress plugin.
- Prioritize internet-facing sites running version 5.1.1 or earlier.
- Check the vendor and Patchstack entry for fixed-version guidance.
- If no fix is available, disable or remove the plugin pending vendor guidance.
- Apply any vendor-provided update after testing in staging.
Validation and detection
- Confirm whether mage-eventpress or WpEvently is installed.
- Record the installed plugin version on each WordPress site.
- Flag version 5.1.1 or earlier as potentially affected.
- Verify remediation by confirming the plugin is updated, disabled, or removed.
- Monitor vendor and vulnerability database updates for changed affected-version details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-23549 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.