CVE-2020-36559Network attack vector

Unauthenticated file disclosure via uncleaned request paths

Published Dec 27, 2022 · Updated Apr 11, 2025

Path traversal in aah before 0.12.4 allows remote attackers to read server-accessible files through crafted static-file requests. HTTPEngine.Handle forwarded the request URL path into static-file routing without first canonicalizing dot segments, so traversal sequences escaped the configured target directory. The application must expose a static-file route, and disclosure is limited to files readable by the server process.

CVSS severity7.5
High
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in aah before 0.12.4 allows remote attackers to read server-accessible files through crafted static-file requests. HTTPEngine.Handle forwarded the request URL path into static-file routing without first canonicalizing dot segments, so traversal sequences escaped the configured target directory. The application must expose a static-file route, and disclosure is limited to files readable by the server process.

The record

CVE
CVE-2020-36559
Published
Dec 27, 2022
Updated
Apr 11, 2025
Vendor
aah
Product
aah
Classifications
CWE-22, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 11, 2025Record 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=0 <0.12.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

aah · aahversion=0 <0.12.4

Published CVSS scores

7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application
T1005Data from Local System

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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