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CVE-2026-54347 high CVSS 8.7

Cross-Site Scripting (XSS) in froxlor/froxlor (CVE-2026-54347)

Summary

Cross-site scripting in froxlor/froxlor (CVE-2026-54347). Confidential information can be exposed externally. Exploitable via content. Mitigation: upgrade to 2.3.8 or later.

Original description

The description as published by the source.

Summary

A stored Cross-Site Scripting (XSS) vulnerability in Froxlor's DNS editor allows an authenticated user with DNS editor access (customer role) to inject arbitrary JavaScript into any administrator's browser session. When an administrator views the DNS configuration of an affected domain, the payload executes automatically — enabling complete admin account takeover, credential theft, and full server compromise.

Details

Three code locations combine to create this vulnerability:

1. Input validation does not strip HTML special characters — lib/Froxlor/Api/Commands/DomainZones.php:158

// Only strips non-printable chars. < and > (0x3C/0x3E) pass through unmodified.
$content = preg_replace('/[^\x09\x20-\x7E]/', '', $content);
$content = Dns::encloseTXTContent($content);  // only wraps in quotes, no HTML encoding

2. Display callback returns raw HTML without escaping — lib/Froxlor/UI/Callbacks/Text.php:95

public static function wordwrap(array $attributes): string {
    return wordwrap($attributes['data'], 100, '', true);  // no htmlspecialchars()
}

3. Twig template renders the callback output with |raw — templates/Froxlor/table/table.html.twig:57

{% else %}
    {{ td.data|raw }}   {# string from wordwrap() — rendered without escaping #}
{% endif %}

The DNS editor table assigns [Text::class, 'wordwrap'] as the callback for the content column (lib/tablelisting/tablelisting.dns.php:58). The callback…

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-54347 has been found in froxlor/froxlor.
Attackers can target a specific entry point like content over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.7/10.
What to do: upgrade froxlor/froxlor to 2.3.8 or later.
If unsure, ask your IT team or search "froxlor/froxlor CVE-2026-54347" on the vendor's site.

CVE-2026-54347 (froxlor/froxlor) — CWE-79 / CVSS v3 8.7
Attack vector: remote (network-reachable)
Attack surface: content / TXT / macro
Patched: 2.3.8 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Cross-site scripting (XSS) (CWE-79) exists in froxlor/froxlor. Attackers reach the vulnerable code path via content.

📍 Affected scope

Check the vendor advisory for the affected versions of froxlor/froxlor. Attack surface: content / TXT / macro.

🔥 Severity

Severity: High (CVSS 8.7/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 2.3.8.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'froxlor/froxlor' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'froxlor/froxlor' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で froxlor/froxlor を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade froxlor/froxlor to 2.3.8

    ステージング環境で 2.3.8 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

composer froxlor/froxlor
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.8"}]}]
Packagist froxlor/froxlor
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.8"}]}]

References

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