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MEDIUM severity

GHSA-9v3w-m552-m6ff — pi/pi

MEDIUMFix: pi-engine/pi@557cd05

GHSA-9v3w-m552-m6ff is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in pi/pi. A fix is available for pi/pi — see the affected versions and patch details below.

Pi Cross-site Scripting vulnerability

Also known asCVE-2017-7251
Published
May 13, 2022
Updated
Sep 10, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Sep 26, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk

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

How urgent is this, really

GHSA-9v3w-m552-m6ff by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 379,842 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
🐘pi/pi

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

A Cross-Site Scripting (XSS) was discovered in pi-engine/pi 2.5.0. The vulnerability exists due to insufficient filtration of user-supplied data (preview) passed to the pi-develop/www/script/editor/markitup/preview/markdown.php URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistpi/piall versions2.6.0-alpha1composer require pi/pi:^2.6.0-alpha1

Affected Products

1 product · 1 configurations
Application
pipiengine
≤ 2.5.0
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 pi/pi, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update pi/pi to 2.6.0-alpha1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9v3w-m552-m6ff 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

A Cross-Site Scripting (XSS) was discovered in pi-engine/pi 2.5.0. The vulnerability exists due to insufficient filtration of user-supplied data (preview) passed to the `pi-develop/www/script/editor/markitup/preview/markdown.php` URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.
O3 Security · Impact-Aware SCA

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