CVE-2017-7251: Pi/pi Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-9v3w-m552-m6ff
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2017-7251 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Pi/pi libraries in the Packagist ecosystem. The issue involves pi cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 2.6.0-alpha1.

CVE-2017-7251 at a Glance

CVE Identifier CVE-2017-7251
GHSA Identifier GHSA-9v3w-m552-m6ff
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Pi/pi
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2017-7251

To remediate this vulnerability, upgrade all affected Pi/pi dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pi/pi fixed: 2.6.0-alpha1 
Upgrade pi/pi to 2.6.0-alpha1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for pi/pi

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-7251, inspect your project dependencies for Pi/pi:

inspect dependencies for pi/pi

Analyze the terminal output to locate any version of Pi/pi in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.6.0-alpha1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Pi/pi, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2017-7251 Affected Pi/pi Versions

1 component(s)
Fixed Versions:
2.6.0-alpha1
Product / Package Ecosystem Affected Versions Fixed Version
pi/pi
 Packagist
< 2.6.0-alpha1
2.6.0-alpha1

References

NVD — CVE-2017-7251 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-7251
Pi/pi Source Repository REPOSITORY
https://github.com/pi-engine/pi/issues/1523
Security Fix Commit FIX COMMIT
https://github.com/pi-engine/pi/commit/557cd05b21b4d7fe422f90adcfa0c6e3bea06153
Pi/pi Source Repository REPOSITORY
https://github.com/pi-engine/pi
Pi/pi Security Information SECURITY
https://web.archive.org/web/20210124010656/https://www.securityfocus.com/bid/97061

Frequently Asked Questions

What is CVE-2017-7251?
CVE-2017-7251 is a security vulnerability in Pi/pi involving Pi Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Pi/pi versions are affected?
Affected versions include releases prior to 2.6.0-alpha1 across affected packages: pi/pi.
What version fixes CVE-2017-7251?
Upgrading to 2.6.0-alpha1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pi/pi affected?
Yes, pi/pi is affected in releases prior to 2.6.0-alpha1. Upgrade your dependency to 2.6.0-alpha1 or later.
What is the CVSS score of CVE-2017-7251?
CVE-2017-7251 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2017-7251?
CVE-2017-7251 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2017-7251?
Run the dependency tree command: 'inspect dependencies for pi/pi'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9v3w-m552-m6ff",
  "modified" : "2023-07-07T20:48:37Z",
  "published" : "2022-05-13T01:06:56Z",
  "aliases" : [ "CVE-2017-7251" ],
  "summary" : "Pi Cross-site Scripting vulnerability",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pi/pi"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.6.0-alpha1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.5.0"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-7251"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pi-engine/pi/issues/1523"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pi-engine/pi/commit/557cd05b21b4d7fe422f90adcfa0c6e3bea06153"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pi-engine/pi"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210124010656/https://www.securityfocus.com/bid/97061"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-07T20:48:37Z",
    "nvd_published_at" : "2017-03-23T22:59:00Z"
  }
}