CVE-2021-45895: Netgen/tagsbundle Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-xvvv-wj7j-r9jm
Share
CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2021-45895 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Netgen/tagsbundle libraries in the Packagist ecosystem. The issue involves cross-site scripting in netgen tags bundle. Remediation is available by upgrading affected packages to version 3.4.11, 4.0.15.

CVE-2021-45895 at a Glance

CVE Identifier CVE-2021-45895
GHSA Identifier GHSA-xvvv-wj7j-r9jm
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 Netgen/tagsbundle
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-2021-45895

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

netgen/tagsbundle fixed: 3.4.11 
Upgrade netgen/tagsbundle to 3.4.11
netgen/tagsbundle fixed: 4.0.15 
Upgrade netgen/tagsbundle to 4.0.15
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 netgen/tagsbundle

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-45895, inspect your project dependencies for Netgen/tagsbundle:

inspect dependencies for netgen/tagsbundle

Analyze the terminal output to locate any version of Netgen/tagsbundle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.4.11), 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 Netgen/tagsbundle, 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

Netgen Tags Bundle 3.4.x before 3.4.11 and 4.0.x before 4.0.15 allows XSS in the Tags Admin interface.

CVE-2021-45895 Affected Netgen/tagsbundle Versions

2 component(s)
Fixed Versions:
3.4.114.0.15
Product / Package Ecosystem Affected Versions Fixed Version
netgen/tagsbundle
 Packagist
≥ 3.4.0
< 3.4.11
3.4.11
netgen/tagsbundle
 Packagist
≥ 4.0.0
< 4.0.15
4.0.15

References

NVD — CVE-2021-45895 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45895
Netgen/tagsbundle Source Repository REPOSITORY
https://github.com/netgen/TagsBundle
Netgen/tagsbundle Release RELEASE
https://github.com/netgen/TagsBundle/releases/tag/3.4.11
Netgen/tagsbundle Release RELEASE
https://github.com/netgen/TagsBundle/releases/tag/4.0.15

Frequently Asked Questions

What is CVE-2021-45895?
CVE-2021-45895 is a security vulnerability in Netgen/tagsbundle involving Cross-site Scripting in Netgen Tags Bundle under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Netgen/tagsbundle versions are affected?
Affected versions include releases prior to 3.4.11, 4.0.15 across affected packages: netgen/tagsbundle.
What version fixes CVE-2021-45895?
Upgrading to 3.4.11, 4.0.15 (or the latest patched release for your respective branch) resolves the vulnerability.
Is netgen/tagsbundle affected?
Yes, netgen/tagsbundle is affected in releases prior to 3.4.11, 4.0.15. Upgrade your dependency to 3.4.11, 4.0.15 or later.
What is the CVSS score of CVE-2021-45895?
CVE-2021-45895 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-2021-45895?
CVE-2021-45895 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-2021-45895?
Run the dependency tree command: 'inspect dependencies for netgen/tagsbundle'. 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-xvvv-wj7j-r9jm",
  "modified" : "2023-09-13T12:58:16Z",
  "published" : "2022-01-06T22:04:19Z",
  "aliases" : [ "CVE-2021-45895" ],
  "summary" : "Cross-site Scripting in Netgen Tags Bundle",
  "details" : "Netgen Tags Bundle 3.4.x before 3.4.11 and 4.0.x before 4.0.15 allows XSS in the Tags Admin interface.",
  "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" : "netgen/tagsbundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.4.0"
      }, {
        "fixed" : "3.4.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "netgen/tagsbundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.0.15"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-45895"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/netgen/TagsBundle"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/netgen/TagsBundle/releases/tag/3.4.11"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/netgen/TagsBundle/releases/tag/4.0.15"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-05T21:32:08Z",
    "nvd_published_at" : "2021-12-27T21:15:00Z"
  }
}