Security readout for executives and security teams
Plain-English summary
WP Project Manager versions through 4.0.6 contain a critical flaw that an unauthenticated internet user may trigger remotely. Successful exploitation could compromise WordPress data, alter site content, or disrupt availability. The supplied sources do not identify confirmed attacks or provide a verified fixed version.
Executive priority
Treat this as an immediate remediation priority for internet-facing WordPress systems. Assign ownership, establish the affected-site count, and require rapid vendor-guided remediation. Escalate systems holding sensitive data or supporting critical operations, while avoiding claims of compromise without supporting evidence.
Technical view
CVE-2026-78262 is an unauthenticated PHP object-injection vulnerability classified as CWE-502. Its CVSS 3.1 score is 9.8, reflecting network access, low complexity, no privileges, and no user interaction, with potentially high confidentiality, integrity, and availability impact. The supplied evidence does not document the vulnerable entry point or exploitation prerequisites.
Likely exposure
WordPress sites running WP Project Manager 4.0.6 or earlier should be considered potentially exposed, particularly when reachable from the internet. The bundle supplies no affected CPEs and marks the product default status as unaffected, creating metadata ambiguity that requires direct version and vendor verification.
Exploitation context
The CVSS vector indicates remote, unauthenticated exploitation without user interaction. However, the supplied sources provide no evidence of active exploitation, and the CVE is not identified as KEV-listed. Absence from KEV does not prove exploitation is not occurring.
Researcher notes
The public bundle establishes CWE-502, affected versions through 4.0.6, and a critical CVSS vector. It does not describe the input path, deserialization flow, gadget-chain availability, proof of concept, observed exploitation, or fixed version. Those gaps limit exploitability validation and should be resolved through current vendor or Patchstack guidance.
Mitigation direction
- Inventory every WordPress instance running WP Project Manager and record its installed version.
- Check current weDevs and Patchstack guidance for a verified fixed release or vendor-approved mitigation.
- Apply the verified fixed release promptly after testing backups and critical project-management workflows.
- If no supported fix exists, disable the plugin after reviewing operational impact.
- Restrict public access to affected sites where feasible until remediation is verified.
Validation and detection
- Confirm whether WP Project Manager is installed, including inactive copies and staging environments.
- Verify the installed plugin version directly rather than relying only on asset inventory records.
- After remediation, confirm the vulnerable version is absent from every WordPress instance.
- Review security telemetry for unexplained requests or changes affecting sites that ran vulnerable versions.
- Recheck vendor guidance because the supplied bundle does not identify a fixed version.
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-2026-78262 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.
SSVC decision data
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:H3.95.9PatchstackVulnerability 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://patchstack.com/database/wordpress/plugin/wedevs-project-manager/vulnerability/wordpress-wp-project-manager-plugin-4-0-6-php-object-injection-vulnerability?_s_id=cveCVE reference, Patchstack · vdb-entry
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.