CVE-2020-18336Public exploitNetwork attack vector

Local file disclosure via unsanitized PDF export scripts

Published Oct 10, 2023 · Updated Sep 19, 2024

Cross-site scripting in Typora 0.9.65 allows remote attackers to read local files when a crafted document is exported to PDF. The PDF exporter executes embedded script elements without sanitization, and the demonstrated payload reads a local file through XMLHttpRequest before writing its contents into the exported document. Exploitation requires a user to export the crafted document; the published proof of concept demonstrates disclosure on Windows 7.

CVSS severity7.4
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Typora 0.9.65 allows remote attackers to read local files when a crafted document is exported to PDF. The PDF exporter executes embedded script elements without sanitization, and the demonstrated payload reads a local file through XMLHttpRequest before writing its contents into the exported document. Exploitation requires a user to export the crafted document; the published proof of concept demonstrates disclosure on Windows 7.

The record

CVE
CVE-2020-18336
Published
Oct 10, 2023
Updated
Sep 19, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1005, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1005Data from Local System
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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