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MEDIUM severity

Cross-site Scripting in Netgen Tags BundleGHSA-xvvv-wj7j-r9jm

MEDIUM

GHSA-xvvv-wj7j-r9jm is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in netgen/tagsbundle. A fix is available for netgen/tagsbundle — see the affected versions and patch details below.

Also known asCVE-2021-45895
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs51th percentile — riskier than 51% of all scored CVEsHighest risk
0.00%0.39%0.78%1.18%0.2%0.7%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-xvvv-wj7j-r9jm by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected
🐘netgen/tagsbundle🐘netgen/tagsbundle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistnetgen/tagsbundle≥ 3.4.0&&< 3.4.113.4.11composer require netgen/tagsbundle:^3.4.11
🐘Packagistnetgen/tagsbundle≥ 4.0.0&&< 4.0.154.0.15composer require netgen/tagsbundle:^4.0.15

Affected Products

1 product · 2 configurations
Application
tags bundlenetgen
≥ 4.0.0 && < 4.0.15
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for netgen/tagsbundle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update netgen/tagsbundle to 3.4.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xvvv-wj7j-r9jm is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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Cross-site Scripting in Netgen Tags Bundle (Medium 6.1)