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MEDIUM severity

CVE-2023-5861 — microweber

MEDIUMFix: microweber/microweber@6ed7ebf

CVE-2023-5861 is a medium-severity (CVSS 6.4) Cross-site Scripting (XSS) vulnerability in microweber/microweber. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for microweber/microweber — see the affected versions and patch details below.

Cross-site Scripting (XSS) - Stored in microweber/microweber

Also known asGHSA-7q5f-29gx-57ff
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 27, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-5861.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs38th percentile — riskier than 38% of all scored CVEsHighest risk
0.00%0.31%0.63%0.94%0.1%0.4%Apr 26Aug 26Oct 26

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘microweber/microweber

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

Description

Cross-site Scripting (XSS) - Stored in GitHub repository microweber/microweber prior to 2.0.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmicroweber/microweberall versions2.0.0composer require microweber/microweber:^2.0.0

Affected Products

1 product · 1 configurations
Application
microwebermicroweber
< 2.0.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Cross-site Scripting (XSS) - Stored in GitHub repository microweber/micr…

huntr.comNVDNov 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update microweber/microweber to 2.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-5861 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

Cross-site Scripting (XSS) - Stored in GitHub repository microweber/microweber prior to 2.0.
O3 Security · Impact-Aware SCA

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CVE-2023-5861: microweber XSS — Fixed in 2.0.0