CVE-2023-26491: Rsshub Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-32gr-4cq6-5w5q
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2023-26491 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Rsshub libraries in the npm ecosystem. The issue involves rsshub vulnerable to cross-site scripting via unvalidated url parameters. Remediation is available by upgrading affected packages to version 1.0.0-master.c910c4d.

CVE-2023-26491 at a Glance

CVE Identifier CVE-2023-26491
GHSA Identifier GHSA-32gr-4cq6-5w5q
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 Rsshub
Package Ecosystem npm
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-2023-26491

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

rsshub fixed: 1.0.0-master.c910c4d 
npm install rsshub@1.0.0-master.c910c4d
Verify Direct and Transitive Dependencies

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

npm ls rsshub

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-26491, inspect your project dependencies using npm:

npm ls rsshub

Analyze the terminal output to locate any version of Rsshub in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.0-master.c910c4d), your application is affected.

Note: The npm ls rsshub command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

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 Rsshub, 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

### Impact When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. Users who access the deliberately constructed URL are affected. ### Patches This vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version. ### Workarounds No.

CVE-2023-26491 Affected Rsshub Versions

1 component(s)
Fixed Versions:
1.0.0-master.c910c4d
Product / Package Ecosystem Affected Versions Fixed Version
rsshub
npm/rsshub
npm
< 1.0.0-master.c910c4d
1.0.0-master.c910c4d

References

GitHub Advisory / Wiki ADVISORY
https://github.com/DIYgod/RSSHub/security/advisories/GHSA-32gr-4cq6-5w5q
NVD — CVE-2023-26491 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-26491
Security Fix Commit FIX COMMIT
https://github.com/DIYgod/RSSHub/commit/c910c4d28717fb860fbe064736641f379fab2c91
Rsshub Source Repository REPOSITORY
https://github.com/DIYgod/RSSHub

Frequently Asked Questions

What is CVE-2023-26491?
CVE-2023-26491 is a security vulnerability in Rsshub involving rsshub vulnerable to Cross-site Scripting via unvalidated URL parameters under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Rsshub versions are affected?
Affected versions include releases prior to 1.0.0-master.c910c4d across affected packages: rsshub.
What version fixes CVE-2023-26491?
Upgrading to 1.0.0-master.c910c4d (or the latest patched release for your respective branch) resolves the vulnerability.
Is rsshub affected?
Yes, rsshub is affected in releases prior to 1.0.0-master.c910c4d. Upgrade your dependency to 1.0.0-master.c910c4d or later.
What is the CVSS score of CVE-2023-26491?
CVE-2023-26491 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-2023-26491?
CVE-2023-26491 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 npm dependencies for CVE-2023-26491?
Run the dependency tree command: 'npm ls rsshub'. 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-32gr-4cq6-5w5q",
  "modified" : "2023-03-13T19:18:32Z",
  "published" : "2023-03-01T18:02:28Z",
  "aliases" : [ "CVE-2023-26491" ],
  "summary" : "rsshub vulnerable to Cross-site Scripting via unvalidated URL parameters",
  "details" : "### Impact\n\nWhen the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code.\n\nUsers who access the deliberately constructed URL are affected.\n\n### Patches\n\nThis vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version.\n\n### Workarounds\n\nNo.\n",
  "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" : "npm",
      "name" : "rsshub"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.0-master.c910c4d"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/DIYgod/RSSHub/security/advisories/GHSA-32gr-4cq6-5w5q"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-26491"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/DIYgod/RSSHub/commit/c910c4d28717fb860fbe064736641f379fab2c91"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/DIYgod/RSSHub"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-01T18:02:28Z",
    "nvd_published_at" : "2023-03-03T23:15:00Z"
  }
}