CVE-2020-1745Network attack vector

File disclosure via unrestricted AJP attributes

Published Apr 28, 2020 · Updated Aug 4, 2024

File inclusion in Red Hat Undertow 2.0.29.Final and earlier allows remote attackers to read application files through its AJP connector. AjpRequestParser accepts arbitrary AJP request attributes, allowing crafted include-path attributes to select server-side resources. Unauthenticated access to exposed AJP port 8009 enables file reads; code execution additionally requires an attacker-controlled JSP upload.

CVSS severity8.6
High
EPSS probability4.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File inclusion in Red Hat Undertow 2.0.29.Final and earlier allows remote attackers to read application files through its AJP connector. AjpRequestParser accepts arbitrary AJP request attributes, allowing crafted include-path attributes to select server-side resources. Unauthenticated access to exposed AJP port 8009 enables file reads; code execution additionally requires an attacker-controlled JSP upload.

The record

CVE
CVE-2020-1745
Published
Apr 28, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Undertow
Classifications
CWE-285, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.0.29.Final

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Undertowversion=<= 2.0.29.Final

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6Red Hat CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
7.6Red Hat Product SecurityCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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