CVE-2020-8548Public exploitNetwork attack vector

Code execution via crafted Markdown rendering

Published Feb 3, 2020 · Updated Aug 4, 2024

Cross-site scripting in massCode 1.0.0-alpha.6 allows remote attackers to execute code through crafted Markdown rendered by the app. The Markdown rendering path treats attacker-controlled markup as executable content while webPreferences enables Node.js integration. Exploitation requires user interaction and runs attacker code with the desktop application's Node.js privileges on the workstation.

CVSS severity6.1
Medium
EPSS probability1.44%
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 massCode 1.0.0-alpha.6 allows remote attackers to execute code through crafted Markdown rendered by the app. The Markdown rendering path treats attacker-controlled markup as executable content while webPreferences enables Node.js integration. Exploitation requires user interaction and runs attacker code with the desktop application's Node.js privileges on the workstation.

The record

CVE
CVE-2020-8548
Published
Feb 3, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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')
T1204User Execution

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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