CVE-2022-31540Public exploitNetwork attack vector

Arbitrary file read via unsanitized download path

Published Jul 11, 2022 · Updated Aug 3, 2024

Absolute path traversal in kumardeepak hin-eng-preprocessing through 2019-07-16 allows remote attackers to read files via a crafted URL. The /download-docx route prefixes upload/ to an attacker-controlled filename and passes the result to flask.send_file without confining the resolved path to that directory. No authentication or user interaction is required; reachable files can include source, configuration, credentials, or other host data, and repeated retrieval of large files can interrupt service.

CVSS severity9.3
Critical
EPSS probability1.30%
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 kumardeepak hin-eng-preprocessing through 2019-07-16 allows remote attackers to read files via a crafted URL. The /download-docx route prefixes upload/ to an attacker-controlled filename and passes the result to flask.send_file without confining the resolved path to that directory. No authentication or user interaction is required; reachable files can include source, configuration, credentials, or other host data, and repeated retrieval of large files can interrupt service.

The record

CVE
CVE-2022-31540
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 NVDAV:N/AC:L/Au:N/C:P/I:N/A:P
9.3NIST NVDCVSS: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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