CVE-2023-50639Public exploitNetwork attack vector

Sensitive-data disclosure via uploaded malicious PDF

Published Dec 20, 2023 · Updated Aug 2, 2024

Stored cross-site scripting in CuteHttpFileServer 1.0 and 2.0 allows remote authenticated users to execute script through an uploaded PDF. The home-page upload function stores a PDF containing active script, and the server returns the file so Chrome executes the embedded code when opened. This requires low-privileged upload access and a user to open the file, after which browser-context code reads sensitive information.

CVSS severity5.4
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in CuteHttpFileServer 1.0 and 2.0 allows remote authenticated users to execute script through an uploaded PDF. The home-page upload function stores a PDF containing active script, and the server returns the file so Chrome executes the embedded code when opened. This requires low-privileged upload access and a user to open the file, after which browser-context code reads sensitive information.

The record

CVE
CVE-2023-50639
Published
Dec 20, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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