Security readout for executives and security teams
Plain-English summary
This is a critical file-upload flaw in the vcita WordPress booking plugin. A highly privileged WordPress user could upload dangerous files, potentially leading to full site compromise. Public sources do not show confirmed active exploitation or a named fixed version.
Executive priority
Treat this as urgent for any public WordPress property using the vcita booking plugin. Prioritize inventory, containment, and vendor guidance. Business risk is high because successful abuse could affect data, site integrity, and availability, although current sources do not confirm active exploitation.
Technical view
CVE-2025-54677 is CWE-434 unrestricted upload of a dangerous file type in meeting-scheduler-by-vcita through version 4.5.3. CVSS 3.1 is 9.1: network reachable, low complexity, high privileges required, no user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites running Online Booking & Scheduling Calendar for WordPress by vcita, package meeting-scheduler-by-vcita, at version 4.5.3 or earlier. The CVSS vector indicates exploitation requires high privileges, so compromised administrator or similar accounts are the main concern.
Exploitation context
The source bundle marks CISA KEV as false and provides no cited evidence of active exploitation. Patchstack lists a public vulnerability entry. The available evidence does not include exploit details, proof-of-concept status, or a specific fixed release.
Researcher notes
Key uncertainty is remediation status: the supplied sources identify affected versions through 4.5.3 but do not name a fixed release. The high-privilege requirement materially affects exploitability, but compromised admin accounts remain a realistic pathway in WordPress environments.
Mitigation direction
- Inventory WordPress sites for meeting-scheduler-by-vcita version 4.5.3 or earlier.
- Check vcita and Patchstack guidance for a fixed version or official workaround.
- Disable or remove the plugin if no safe vendor-supported version is confirmed.
- Restrict high-privilege WordPress accounts and review administrator access immediately.
- Apply standard hardening for file upload execution paths on affected sites.
Validation and detection
- Confirm the plugin name and installed version on every WordPress site.
- Verify affected sites are not running version 4.5.3 or earlier.
- Review privileged WordPress accounts for unexpected or stale access.
- Inspect upload and plugin-related directories for unexpected executable files.
- Check web and WordPress logs for suspicious privileged upload activity.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-54677 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
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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:H/UI:N/S:C/C:H/I:H/A:H2.36Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.