CVE-2022-31504Public exploitNetwork attack vector

Arbitrary file read via unsafe download paths

Published Jul 11, 2022 · Updated Aug 3, 2024

Absolute path traversal in ChangeWeDer BaiduWenkuSpider_flaskWeb before 2021-11-29 allows remote attackers to read arbitrary files. The /path:url/path:filename download route passes attacker-controlled path components through os.path.join into Flask send_from_directory without safe_join containment. An unauthenticated HTTP request can escape the intended download directory and disclose files readable by the server process.

CVSS severity9.3
Critical
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Absolute path traversal in ChangeWeDer BaiduWenkuSpider_flaskWeb before 2021-11-29 allows remote attackers to read arbitrary files. The /path:url/path:filename download route passes attacker-controlled path components through os.path.join into Flask send_from_directory without safe_join containment. An unauthenticated HTTP request can escape the intended download directory and disclose files readable by the server process.

The record

CVE
CVE-2022-31504
Published
Jul 11, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

6.4NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:N/A:P
9.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/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.

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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

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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