CVE-2023-49583: @sap/xssec Cross-Site Scripting Vulnerability

CRITICAL
Advisory Identifier: GHSA-p2vx-qj66-88q3
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CVSS 9.1
CWE-639 CWE-269 CWE-749
Published
Advisory Summary

CVE-2023-49583 is a CRITICAL (CVSS 9.1) cross-site scripting vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting @sap/xssec libraries in the npm ecosystem. The issue involves escalation of privileges in @sap/xssec. Remediation is available by upgrading affected packages to version 3.6.0.

CVE-2023-49583 at a Glance

CVE Identifier CVE-2023-49583
GHSA Identifier GHSA-p2vx-qj66-88q3
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product @sap/xssec
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.1

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:N/S:U/C:H/I:H/A:N).

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

How to Fix CVE-2023-49583

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

@sap/xssec fixed: 3.6.0 
npm install @sap/xssec@3.6.0
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 @sap/xssec

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-49583, inspect your project dependencies using npm:

npm ls @sap/xssec

Analyze the terminal output to locate any version of @sap/xssec in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.6.0), your application is affected.

Note: The npm ls @sap/xssec 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. In @sap/xssec, 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

SAP BTP Security Services Integration Library ([Node.js] @sap/xssec - versions < 3.6.0, allow under certain conditions an escalation of privileges. On successful exploitation, an unauthenticated attacker can obtain arbitrary permissions within the application.

CVE-2023-49583 Affected @sap/xssec Versions

1 component(s)
Fixed Versions:
3.6.0
Product / Package Ecosystem Affected Versions Fixed Version
@sap/xssec
npm/@sap/xssec
npm
< 3.6.0
3.6.0

References

NVD — CVE-2023-49583 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-49583
@sap/xssec Security Information SECURITY
https://blogs.sap.com/2023/12/12/unveiling-critical-security-updates-sap-btp-security-note-3411067
me.sap.com/notes/3411067 WEB
https://me.sap.com/notes/3411067
me.sap.com/notes/3412456 WEB
https://me.sap.com/notes/3412456
me.sap.com/notes/3413475 WEB
https://me.sap.com/notes/3413475
www.npmjs.com/package/@sap/xssec WEB
https://www.npmjs.com/package/@sap/xssec
www.sap.com/documents/2022/02/f... WEB
https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html

Frequently Asked Questions

What is CVE-2023-49583?
CVE-2023-49583 is a security vulnerability in @sap/xssec involving Escalation of privileges in @sap/xssec under CWE-639: Authorization Bypass Through User-Controlled Key.
Which @sap/xssec versions are affected?
Affected versions include releases prior to 3.6.0 across affected packages: @sap/xssec.
What version fixes CVE-2023-49583?
Upgrading to 3.6.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @sap/xssec affected?
Yes, @sap/xssec is affected in releases prior to 3.6.0. Upgrade your dependency to 3.6.0 or later.
What is the CVSS score of CVE-2023-49583?
CVE-2023-49583 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2023-49583?
CVE-2023-49583 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check npm dependencies for CVE-2023-49583?
Run the dependency tree command: 'npm ls @sap/xssec'. 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-p2vx-qj66-88q3",
  "modified" : "2024-09-30T13:40:50Z",
  "published" : "2023-12-12T03:31:45Z",
  "aliases" : [ "CVE-2023-49583" ],
  "summary" : "Escalation of privileges in @sap/xssec",
  "details" : "SAP BTP Security Services Integration Library ([Node.js] @sap/xssec - versions < 3.6.0, allow under certain conditions an escalation of privileges. On successful exploitation, an unauthenticated attacker can obtain arbitrary permissions within the application.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@sap/xssec"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.6.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-49583"
  }, {
    "type" : "WEB",
    "url" : "https://blogs.sap.com/2023/12/12/unveiling-critical-security-updates-sap-btp-security-note-3411067"
  }, {
    "type" : "WEB",
    "url" : "https://me.sap.com/notes/3411067"
  }, {
    "type" : "WEB",
    "url" : "https://me.sap.com/notes/3412456"
  }, {
    "type" : "WEB",
    "url" : "https://me.sap.com/notes/3413475"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/package/@sap/xssec"
  }, {
    "type" : "WEB",
    "url" : "https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-269", "CWE-639", "CWE-749" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-12-20T17:57:49Z",
    "nvd_published_at" : "2023-12-12T02:15:07Z"
  }
}