--- title: "Laravel Framework XSS in Blade templating engine" system_id: "laravel" category: "frameworks" advisory_mode: "core" published_date: "2021-12-08T19:57:36Z" updated_date: "2026-03-13T22:01:16.767646Z" severity: "low" exploit_status: "unknown" source_confidence: "official" verification_status: "triage-manual" verification_mode: "synthetic" artifact_mode: "synthetic" last_run_id: "" target_types: - "lab-local" - "lab-public" - "authorized-third-party" allow_public_validation: "yes, with ownership or explicit authorization" authorization_prerequisite: "asset ownership proof or explicit written authorization" minimal_validation: "read-only probe, controlled payload, reversible test" aliases: - "CVE-2021-43808" - "GHSA-66hf-2p6w-jqfw" affected_versions: - "5.0.30" - "5.2.41" - "v4.0.0" - "v4.0.0-BETA2" - "v4.0.0-BETA3" - "v4.0.0-BETA4" - "v4.0.1" - "v4.0.10" - "v4.0.11" - "v4.0.2" - "v4.0.3" - "v4.0.4" - "v4.0.5" - "v4.0.6" - "v4.0.7" - "v4.0.8" - "v4.0.9" - "v4.1.0" - "v4.1.1" - "v4.1.10" fixed_versions: - "6.20.42" - "7.30.6" - "8.75.0" secure_code_topics: - "xss-output-encoding" - "authz-server-side-recheck" - "file-upload-validation" primary_source: "https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw" --- # Laravel Framework XSS in Blade templating engine ## 本地实证状态 - 实证状态: `triage-manual` - 实证方式: `synthetic` - Artifact 模式: `synthetic` - 最近运行: `-` - 浏览器证据: `missing` - Run Bundle: `-` ## 事件层 - Canonical ID: `laravel--CVE-2021-43808` - 系统: `laravel` - 严重度: `low` - 来源置信度: `official` - 官方主源: https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw - 影响版本: `5.0.30, 5.2.41, v4.0.0, v4.0.0-BETA2, v4.0.0-BETA3, v4.0.0-BETA4, v4.0.1, v4.0.10, v4.0.11, v4.0.2` - 修复版本: `6.20.42, 7.30.6, 8.75.0` ## 其他来源 - https://nvd.nist.gov/vuln/detail/CVE-2021-43808 - https://github.com/laravel/framework/pull/39906 - https://github.com/laravel/framework/pull/39908 - https://github.com/laravel/framework/pull/39909 - https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b - https://github.com/FriendsOfPHP/security-advisories/blob/master/illuminate/view/CVE-2021-43808.yaml - https://github.com/FriendsOfPHP/security-advisories/blob/master/laravel/framework/CVE-2021-43808.yaml - https://github.com/laravel/framework - https://github.com/laravel/framework/releases/tag/v6.20.42 - https://github.com/laravel/framework/releases/tag/v7.30.6 - https://github.com/laravel/framework/releases/tag/v8.75.0 ## 实验层 - 仅用于自有资产、测试环境或已明确授权目标。 - 允许公网可达目标，但必须满足资产归属或明确授权前提。 - 最小化验证方式: 最小化验证、只读探测、可审计回显、受控注入。 - 若该案例涉及插件、模块或扩展，应同时检查供应链与升级策略。 - 禁止场景: 无归属证明或无明确授权的公网目标；知名公共网站或与测试无关的第三方资产；会造成持久破坏、数据越权下载或不可回滚影响的动作 ## 修复示例 - [javascript-typescript:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/javascript-typescript/xss-output-encoding.md) - [nodejs:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/nodejs/xss-output-encoding.md) - [java:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/java/xss-output-encoding.md) - [php:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/php/xss-output-encoding.md) - [python:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/python/xss-output-encoding.md) - [ruby:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/ruby/xss-output-encoding.md) - [csharp:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/csharp/xss-output-encoding.md) - [go:xss-output-encoding](/Users/x/websafe/05-defense/secure-code/go/xss-output-encoding.md) - [javascript-typescript:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/javascript-typescript/authz-server-side-recheck.md) - [nodejs:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/nodejs/authz-server-side-recheck.md) - [java:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/java/authz-server-side-recheck.md) - [php:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/php/authz-server-side-recheck.md) - [python:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/python/authz-server-side-recheck.md) - [ruby:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/ruby/authz-server-side-recheck.md) - [csharp:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/csharp/authz-server-side-recheck.md) - [go:authz-server-side-recheck](/Users/x/websafe/05-defense/secure-code/go/authz-server-side-recheck.md) - [javascript-typescript:file-upload-validation](/Users/x/websafe/05-defense/secure-code/javascript-typescript/file-upload-validation.md) - [nodejs:file-upload-validation](/Users/x/websafe/05-defense/secure-code/nodejs/file-upload-validation.md) - [java:file-upload-validation](/Users/x/websafe/05-defense/secure-code/java/file-upload-validation.md) - [php:file-upload-validation](/Users/x/websafe/05-defense/secure-code/php/file-upload-validation.md) - [python:file-upload-validation](/Users/x/websafe/05-defense/secure-code/python/file-upload-validation.md) - [ruby:file-upload-validation](/Users/x/websafe/05-defense/secure-code/ruby/file-upload-validation.md) - [csharp:file-upload-validation](/Users/x/websafe/05-defense/secure-code/csharp/file-upload-validation.md) - [go:file-upload-validation](/Users/x/websafe/05-defense/secure-code/go/file-upload-validation.md)