Security readout for executives and security teams
Plain-English summary
CVE-2026-25435 is a stored cross-site scripting issue in the WordPress “Booking calendar, Appointment Booking System” plugin by wpdevart. Affected pages could store attacker-supplied script that runs when another user views it. Business risk is highest for sites using this booking plugin with administrative staff handling bookings in WordPress.
Executive priority
Prioritize within normal high-severity WordPress remediation cycles, especially for public booking sites. There is no sourced evidence of active exploitation, but stored XSS can affect administrator sessions and customer-facing trust if abused.
Technical view
The CVE describes improper neutralization of input during web page generation, classified as CWE-79. It affects the booking-calendar plugin through version 3.2.36 according to the CVE description. CVSS 3.1 is 7.1, with network attack vector, low complexity, no privileges required, user interaction required, and changed scope.
Likely exposure
Exposure is likely limited to WordPress sites with the wpdevart Booking calendar, Appointment Booking System plugin installed at an affected version. The public data does not identify affected configurations, roles, or specific vulnerable fields.
Exploitation context
No CISA KEV listing is provided, and the supplied sources do not state active exploitation. Because this is stored XSS with no privileges required but user interaction required, risk depends on whether attacker-controlled booking content can be viewed by staff or users.
Researcher notes
The source bundle contains limited technical detail and no exploit specifics. Note a version inconsistency: the CVE text says through 3.2.36, while the Patchstack URL title references 3.2.35. Treat 3.2.36 as the conservative affected ceiling until vendor data is confirmed.
Mitigation direction
- Identify WordPress sites running the booking-calendar plugin.
- Check installed plugin version against vendor and Patchstack guidance.
- Update the plugin if a fixed version is available from the vendor.
- If no fix is available, consider disabling the plugin until guidance is clear.
- Restrict who can submit or view booking content where operationally possible.
Validation and detection
- Inventory WordPress installations and installed plugin versions.
- Confirm whether booking-calendar is present and at or below 3.2.36.
- Review vendor/Patchstack advisory for fixed-version details.
- Check web logs and WordPress activity for suspicious booking submissions.
- Verify remediation by confirming the plugin is updated or disabled.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-25435 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
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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:R/S:C/C:L/I:L/A:L2.83.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.