Security readout for executives and security teams
Plain-English summary
This flaw can let a malicious PDF compromise a workstation running Foxit Reader 12.1.2.15332. The user must open the document, or browse to a malicious site if the Foxit browser plugin is enabled. The bundle does not show active exploitation.
Executive priority
Treat as a high-priority endpoint risk where Foxit Reader is deployed. Prioritize inventory, browser-plugin reduction, and vendor-confirmed remediation, especially for users who handle external PDFs.
Technical view
CVE-2023-33876 is a CWE-416 use-after-free in Foxit Reader annotation destruction. Crafted JavaScript in a PDF can cause reuse of a freed object, memory corruption, and arbitrary code execution. CVSS 3.1 is 8.8 with user interaction required.
Likely exposure
Exposure is limited to environments with Foxit Reader 12.1.2.15332, especially endpoints that receive external PDFs or have the Foxit browser plugin enabled.
Exploitation context
The source bundle describes malicious PDF or malicious-site delivery, with user interaction required. KEV is false, and no cited source in the bundle confirms active exploitation.
Researcher notes
The bundle supports affected product, version, trigger conditions, CWE, impact, and CVSS. It does not provide a fixed version, official workaround, or evidence of exploitation in the wild.
Mitigation direction
- Inventory and prioritize Foxit Reader 12.1.2.15332 endpoints.
- Check Foxit vendor guidance for the remediated version or official workaround.
- Disable the Foxit browser plugin extension where it is not required.
- Reduce user exposure to untrusted PDFs through mail and web controls.
- Use endpoint detection and application control for high-risk PDF workflows.
Validation and detection
- Confirm whether Foxit Reader 12.1.2.15332 is installed on endpoints.
- Check whether the Foxit browser plugin extension is enabled in managed browsers.
- Review exposure to external PDFs from email, web downloads, and shared repositories.
- Verify remediation guidance directly with Foxit before approving rollout.
- Monitor security telemetry for suspicious PDF handling by Foxit Reader.
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-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-33876 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.
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:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.