Security readout for executives and security teams
Plain-English summary
An unauthenticated attacker can reportedly change any WordPress user’s email address through vulnerable TrueBooker AJAX functionality. They could then use the normal password-reset process to seize an administrator account, potentially compromising site data, content, credentials, and availability.
Executive priority
Prioritize same-day identification and remediation of exposed installations. The reported path requires no authentication or user interaction and can lead directly to administrator takeover. Escalate incident review where account emails, password resets, or privileged users changed unexpectedly.
Technical view
TrueBooker versions before 1.2.7 lack proper authorization checks in multiple AJAX actions. A remote, unauthenticated actor can change an arbitrary user’s email address, including an administrator’s, then initiate password recovery. The issue maps to CWE-269 and CWE-284 and has a CVSS 3.1 score of 9.8.
Likely exposure
Internet-accessible WordPress sites running TrueBooker earlier than 1.2.7 are the likely exposure population. The supplied evidence does not identify affected installations, hosting configurations, or whether disabling particular features reduces exposure.
Exploitation context
The WPScan reference is tagged as containing exploit information, but the supplied sources do not establish active exploitation. CVE-2026-18776 is not listed as KEV in the provided bundle. Treat the low-complexity, unauthenticated account-takeover path as urgent without claiming observed attacks.
Researcher notes
The supplied description establishes an authorization failure and account-recovery chain but does not name the affected AJAX actions or provide patch-diff details. The affected-data field is internally sparse, listing version “0,” while the narrative clearly states versions before 1.2.7. Confirm finer version boundaries through vendor or WPScan guidance.
Mitigation direction
- Update TrueBooker to version 1.2.7 or later after verifying vendor guidance.
- If immediate updating is impossible, disable or remove TrueBooker until vendor-approved mitigation is available.
- Reset affected administrator credentials and restore unauthorized email changes if compromise is suspected.
- Review vendor and WordPress security guidance for newly published remediation details.
Validation and detection
- Inventory WordPress sites and identify every installed TrueBooker version.
- Confirm no production instance runs a TrueBooker release earlier than 1.2.7.
- Review administrator accounts for unexpected email-address changes or newly created privileged users.
- Examine password-reset and web logs for suspicious activity involving unauthenticated AJAX requests.
- After updating, verify the installed version and test legitimate booking functionality.
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-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-18776 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:H3.95.9CISA-ADPVulnerability 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://wpscan.com/vulnerability/4b6abb2d-941b-429f-a480-33d1aafad450/CVE reference, WPScan · exploit, 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.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.