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Not in CISA KEV
LOW severity

Directory Traversal vulnerability in GET/PUT allows attackers to Disclose Information or Write Files via a crafted GET/PUT requestGHSA-hwv5-w8gm-fq9f

LOWFix: horazont/xmpp-http-upload#12

GHSA-hwv5-w8gm-fq9f is a low-severity (CVSS 3.5) Path Traversal vulnerability in xmpp-http-upload. A fix is available for xmpp-http-upload — see the affected versions and patch details below.

Also known asCVE-2020-15239PYSEC-2020-158
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs79th percentile — riskier than 79% of all scored CVEsHighest risk
0.00%0.80%1.60%2.40%0.1%1.9%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-hwv5-w8gm-fq9f by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐍xmpp-http-upload

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Information Disclosure

When the GET method is attacked, attackers can read files which have a .data suffix and which are accompanied by a JSON file with the .meta suffix. This can lead to Information Disclosure and in some shared-hosting scenarios also to circumvention of authentication or other limitations on the outbound (GET) traffic.

For example, in a scenario where a single server has multiple instances of the application running (with separate DATA_ROOT settings), an attacker who has knowledge about the directory structure is able to read files from any other instance to which the process has read access.

If instances have individual authentication (for example, HTTP authentication via a reverse proxy, source IP based filtering) or other restrictions (such as quotas), attackers may circumvent those limits in such a scenario by using the Directory Traversal to retrieve data from the other instances.

File Write

If the associated XMPP server (or anyone knowing the SECRET_KEY) is malicious, they can write files outside the DATA_ROOT. The files which are written are constrained to have the .meta and the .data suffixes; the .meta file will contain the JSON with the Content-Type of the original request and the .data file will contain the payload.

Patches

PR #12 fixes the issue. The PR has been merged into version 0.4.0 and 0.4.0 has been released and pushed to PyPI. Users are advised to upgrade immediately.

Workarounds

  • Apache can apparently be configured to filter such malicious paths when reverse-proxying.
  • There are no other workarounds known.

References

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIxmpp-http-uploadall versions0.4.0pip install --upgrade 'xmpp-http-upload==0.4.0'

Affected Products

1 product · 1 configurations
Application
xmpp-http-uploadxmpp-http-upload_project
< 0.4.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for xmpp-http-upload, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update xmpp-http-upload to 0.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hwv5-w8gm-fq9f is resolved across your whole dependency graph.

  3. Workarounds

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

### Impact #### Information Disclosure When the GET method is attacked, attackers can read files which have a `.data` suffix and which are accompanied by a JSON file with the `.meta` suffix. This can lead to Information Disclosure and in some shared-hosting scenarios also to circumvention of authentication or other limitations on the outbound (GET) traffic. For example, in a scenario where a single server has multiple instances of the application running (with separate DATA_ROOT settings), an attacker who has knowledge about the directory structure is able to read files from any other insta
O3 Security · Impact-Aware SCA

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Directory Traversal vulnerability in GET/PUT allows…