Vulnerability in php-laravel-framework (DEBIAN-CVE-2021-43808)

Summary

Vulnerability in php-laravel-framework (DEBIAN-CVE-2021-43808). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 6.20.14+dfsg-2+deb11u1 or later.

Original description

The description as published by the source.

Laravel is a web application framework. Laravel prior to versions 8.75.0, 7.30.6, and 6.20.42 contain a possible cross-site scripting (XSS) vulnerability in the Blade templating engine. A broken HTML element may be clicked and the user taken to another location in their browser due to XSS. This is due to the user being able to guess the parent placeholder SHA-1 hash by trying common names of sections. If the parent template contains an exploitable HTML structure an XSS vulnerability can be exposed. This vulnerability has been patched in versions 8.75.0, 7.30.6, and 6.20.42 by determining the parent placeholder at runtime and using a random hash that is unique to each request.

Source: OSV.dev (Open Source Vulnerabilities) OSV

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 DEBIAN-CVE-2021-43808 has been found in php-laravel-framework.
Risk of unauthorized operations or information disclosure.
What to do: upgrade php-laravel-framework to 6.20.14+dfsg-2+deb11u1 or later.
If unsure, ask your IT team or search "php-laravel-framework DEBIAN-CVE-2021-43808" on the vendor's site.

DEBIAN-CVE-2021-43808 (php-laravel-framework)
Attack vector: remote (network-reachable) / unauthenticated
Patched: 6.20.14+dfsg-2+deb11u1 — 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

A vulnerability (unclassified) exists in php-laravel-framework.

📍 Affected scope

Check the vendor advisory for the affected versions of php-laravel-framework.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 6.20.14+dfsg-2+deb11u1.

🛡️ 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 'php-laravel-framework' . 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
Identify exposure identify
```
grep -r 'php-laravel-framework' . | 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 php-laravel-framework を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade php-laravel-framework to 6.20.14+dfsg-2+deb11u1
```
ステージング環境で 6.20.14+dfsg-2+deb11u1 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
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

Debian:11 php-laravel-framework

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.20.14+dfsg-2+deb11u1"}]}]

Debian:12 php-laravel-framework

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.20.14+dfsg-3"}]}]

Debian:13 php-laravel-framework

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.20.14+dfsg-3"}]}]

Debian:14 php-laravel-framework

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.20.14+dfsg-3"}]}]

References

advisory security-tracker.debian.org