CVE-2022-25849: Joyqi/hyper down Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-4r9g-w48q-8jwm
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2022-25849 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Joyqi/hyper down libraries in the Packagist ecosystem. The issue involves hyperdown vulnerable to cross-site scripting. Remediation is available in the latest vendor maintenance releases.

CVE-2022-25849 at a Glance

CVE Identifier CVE-2022-25849
GHSA Identifier GHSA-4r9g-w48q-8jwm
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 Joyqi/hyper down
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-2022-25849

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

joyqi/hyper-down fixed: Latest secure release 
Upgrade joyqi/hyper-down to Latest secure release
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 joyqi/hyper-down

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-25849, inspect your project dependencies for Joyqi/hyper down:

inspect dependencies for joyqi/hyper-down

Analyze the terminal output to locate any version of Joyqi/hyper down in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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 Joyqi/hyper down, 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

HyperDown is a markdown parser written for the Chinese website SegmentFault. Improper validation of the href attribute allows for Cross-site Scripting. At publication there are no patched versions, and no known workarounds.

CVE-2022-25849 Affected Joyqi/hyper down Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
joyqi/hyper-down
 Packagist
≤ 2.4.27

References

NVD — CVE-2022-25849 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-25849
Joyqi/hyper down Source Repository REPOSITORY
https://github.com/SegmentFault/HyperDown
Joyqi/hyper down Security Information SECURITY
https://security.snyk.io/vuln/SNYK-PHP-JOYQIHYPERDOWN-2953544

Frequently Asked Questions

What is CVE-2022-25849?
CVE-2022-25849 is a security vulnerability in Joyqi/hyper down involving HyperDown vulnerable to Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Joyqi/hyper down versions are affected?
Affected versions include releases prior to current release patches across affected packages: joyqi/hyper-down.
What version fixes CVE-2022-25849?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is joyqi/hyper-down affected?
Yes, joyqi/hyper-down is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2022-25849?
CVE-2022-25849 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-2022-25849?
CVE-2022-25849 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-2022-25849?
Run the dependency tree command: 'inspect dependencies for joyqi/hyper-down'. 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-4r9g-w48q-8jwm",
  "modified" : "2022-11-03T19:32:34Z",
  "published" : "2022-10-26T12:00:29Z",
  "aliases" : [ "CVE-2022-25849" ],
  "summary" : "HyperDown vulnerable to Cross-site Scripting",
  "details" : "HyperDown is a markdown parser written for the Chinese website SegmentFault. Improper validation of the href attribute allows for Cross-site Scripting. At publication there are no patched versions, and no known workarounds.",
  "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" : "joyqi/hyper-down"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.4.27"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-25849"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/SegmentFault/HyperDown"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-PHP-JOYQIHYPERDOWN-2953544"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-10-26T22:42:45Z",
    "nvd_published_at" : "2022-10-26T05:15:00Z"
  }
}