Security readout for executives and security teams
Plain-English summary
CVE-2020-23878 is a reported stack buffer overflow in pdf2json v0.71 while handling PDF cross-reference data. Business urgency depends on whether the organization uses this parser on untrusted PDFs, such as uploads or email attachments.
Executive priority
Prioritize assessment if the business accepts PDFs from customers, partners, or the public. If pdf2json is unused or only processes trusted files, urgency is lower but still requires dependency confirmation.
Technical view
The reported flaw is in XRef::fetch in pdf2json v0.71. The source bundle provides no CVSS score, CWE, confirmed patch version, or vendor mitigation. The memory-safety impact is credible but not fully characterized from the supplied evidence.
Likely exposure
Exposure is most likely where pdf2json v0.71 is embedded in services that parse externally supplied PDFs. The bundle does not identify downstream products, package names, or additional affected versions.
Exploitation context
CISA KEV status is false, and the supplied sources do not show active exploitation. Public proof-of-concept material is referenced, so treat untrusted PDF parsing as a higher-risk use case.
Researcher notes
Evidence is sparse: the CVE description names only pdf2json v0.71 and XRef::fetch. Avoid assuming code execution, fixed versions, or affected forks without project-specific verification.
Mitigation direction
- Inventory systems and dependencies for pdf2json v0.71 usage.
- Check project or vendor guidance for a fixed release or replacement.
- Restrict or disable untrusted PDF parsing where feasible.
- Run PDF conversion in isolated, least-privileged sandboxes.
- Monitor parser crashes and failed PDF conversion events.
Validation and detection
- Confirm whether deployed services call pdf2json v0.71.
- Map all upload, email, and API paths that parse PDFs.
- Check whether XRef::fetch is reachable in deployed workflows.
- Review crash logs around PDF processing services.
- Verify any upgrade or replacement with existing PDF regression tests.
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.
CVE-2020-23878 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/flexpaper/pdf2json/issues/45CVE reference · x_refsource_MISC
- https://github.com/Aurorainfinity/Poc/tree/master/pdf2jsonCVE reference · x_refsource_MISC
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.