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MEDIUM severity

CVE-2018-19785 — php-proxy-app

MEDIUMFix: Athlon1600/php-proxy-app@f74d931

CVE-2018-19785 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in athlon1600/php-proxy-app. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for athlon1600/php-proxy-app — see the affected versions and patch details below.

XSS in PHP-Proxy-App through v3.0

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
2 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.00%0.48%0.96%1.44%0.2%0.9%May 26Sep 26Nov 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
🐘athlon1600/php-proxy-app

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

PHP-Proxy-App through 3.0 has Cross-Site Scripting (XSS) via the URL field in index.php.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistathlon1600/php-proxy-appall versions3.0composer require athlon1600/php-proxy-app:^3.0

Affected Products

1 product · 1 configurations
Application
php-proxyphp-proxy
≤ 5.1.0
range
Exploits & PoCs
2

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

PHP-Proxy through 5.1.0 has Cross-Site Scripting (XSS) via the URL field…

github.comNVDDec 2018

Report on github.com

github.comNVDDec 2018

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for athlon1600/php-proxy-app, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update athlon1600/php-proxy-app to 3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-19785 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

PHP-Proxy-App through 3.0 has Cross-Site Scripting (XSS) via the URL field in index.php.
O3 Security · Impact-Aware SCA

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CVE-2018-19785: php-proxy-app XSS — Fixed in 3.0