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Not in CISA KEV
MEDIUM severity

CSRF in PHP Server Monitor before 3.3.2GHSA-w2g4-g8xr-px4x

MEDIUMFix: phpservermon/phpservermon@3015071

GHSA-w2g4-g8xr-px4x is a medium-severity (CVSS 6.5) Cross-Site Request Forgery (CSRF) vulnerability in phpservermon/phpservermon. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for phpservermon/phpservermon — see the affected versions and patch details below.

Also known asCVE-2018-18921
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.37%0.74%1.11%0.1%0.6%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
🐘phpservermon/phpservermon

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 Server Monitor before 3.3.2 has CSRF, as demonstrated by a Delete action.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistphpservermon/phpservermonall versions3.3.2composer require phpservermon/phpservermon:^3.3.2

Affected Products

1 product · 1 configurations
Application
php server monitorphpservermonitor
< 3.3.2
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.

PHP Server Monitor before 3.3.2 has CSRF, as demonstrated by a Delete ac…

medium.comNVDJan 2019

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update phpservermon/phpservermon to 3.3.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-w2g4-g8xr-px4x is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

PHP Server Monitor before 3.3.2 has CSRF, as demonstrated by a Delete action.
O3 Security · Impact-Aware SCA

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CSRF in PHP Server Monitor before 3.3.2 (Medium 6.5)