CVE-2022-31534: The echoleegroup/PythonWeb repository through 2018-10-31 on GitHub allows absolute path traversal because the

Q: How do I fix CVE-2022-31534?

pythonweb: upgrade to newer than 2018-10-31. Exact commands for each OS are on this page.

Q: Is CVE-2022-31534 being exploited?

CVE-2022-31534 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-31534 affect?

CVE-2022-31534 affects pythonweb. Severity is critical (CVSS 9.3). The echoleegroup/PythonWeb repository through 2018-10-31 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.

Q: How urgent is CVE-2022-31534?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.3REMOTEUPGRADE

CVE-2022-31534 is a critical-severity flaw (CVSS 9.3) affecting pythonweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The echoleegroup/PythonWeb repository through 2018-10-31 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-22
Published	2022-07-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pythonweb project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-07-11 01:15 UTCPublished CVE record published
2026-06-17 04:45 UTCUpdated Record last modified

pythonweb project pythonweb UPGRADE

Affected: <= 2018-10-31

Fixed in: newer than 2018-10-31

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pythonweb || rpm -q pythonweb || pythonweb --version

2. UPGRADE to newer than 2018-10-31 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pythonweb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pythonweb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-31534?

pythonweb: upgrade to newer than 2018-10-31. Exact commands for each OS are on this page.

Is CVE-2022-31534 being exploited?

CVE-2022-31534 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-31534 affect?

CVE-2022-31534 affects pythonweb. Severity is critical (CVSS 9.3). The echoleegroup/PythonWeb repository through 2018-10-31 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.

How urgent is CVE-2022-31534?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities · Flask vulnerabilities

References

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