Security readout for executives and security teams
Plain-English summary
A logged-in WordPress user with contributor-level permissions or higher could store malicious script through PDF Block plugin versions up to 1.1.0. Another user must view the affected content for impact. Business risk is account/session abuse or content tampering on sites that allow lower-privileged authors.
Executive priority
Treat as a moderate-priority WordPress plugin risk. Prioritize sites with external contributors, many authors, or administrative users who regularly review submitted content. It is not KEV-listed in the provided evidence.
Technical view
CVE-2023-45646 is a CWE-79 stored XSS issue in Henryholtgeerts PDF Block for WordPress. The CVSS 3.1 score is 6.5, requiring network access, low complexity, low privileges, and user interaction, with changed scope and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites running the PDF Block plugin at version 1.1.0 or earlier, especially where contributor-or-higher accounts can create or edit content. The provided sources do not list CPEs or a fixed version.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The scenario requires an authenticated contributor-level user or higher to store XSS content, and a victim user to view affected content.
Researcher notes
The public data identifies authenticated stored XSS through contributor-level access, but the bundle does not include vulnerable parameter details, proof-of-concept material, exploit telemetry, or a named fixed version. Avoid assuming broader WordPress or PDF handling exposure beyond this plugin.
Mitigation direction
- Inventory WordPress sites for the PDF Block plugin and version.
- Check vendor or Patchstack guidance for a fixed release or recommended action.
- Restrict contributor-or-higher access until the issue is resolved.
- Disable or remove the plugin if no safe vendor-supported version is available.
Validation and detection
- Confirm the plugin slug pdf-block and version in WordPress admin or asset inventory.
- Identify users with contributor-level or higher access on affected sites.
- Review recent content edits involving PDF Block for unexpected embedded script behavior.
- Check security tooling for stored XSS alerts tied to affected posts.
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-2023-45646 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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.
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.