Vulnerability in BookStack greater than or equal to (CVE-2020-11055)
Summary
Vulnerability in BookStack greater than or equal to (CVE-2020-11055). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.29.2 or later.
Original description
The description as published by the source.
Impact
A user with permission to create comments could POST HTML directly to the system to be saved in a comment, which would then be executed/displayed to others users viewing the comment. Through this vulnerability custom JavaScript code could be injected and therefore ran on other user machines.
This most impacts scenarios where not-trusted users are given permission to create comments.
Patches
The issue was addressed in BookStack v0.29.2.
After upgrading, The command php artisan bookstack:regenerate-comment-content should be ran to remove any pre-existing dangerous content.
Workarounds
Comments can be disabled in the system settings to prevent them being shown to users. Alternatively, comment creation permissions can be altered as required to only those who are trusted but this will not address existing exploitation of this vulnerability.
References
- BookStack Beta v0.29.2
- JVN#41035278
- BookStack Blog Post
For more information
If you have any questions or comments about this advisory:
- Open an issue in the BookStack GitHub repository.
- Ask on the BookStack Discord chat.
- Follow the BookStack Security Advice to contact someone privately.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory 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 CVE-2020-11055 has been found in BookStack greater than or equal to.
Risk of unauthorized operations or information disclosure.
What to do: upgrade BookStack greater than or equal to to 0.29.2 or later.
If unsure, ask your IT team or search "BookStack greater than or equal to CVE-2020-11055" on the vendor's site.
CVE-2020-11055 (BookStack greater than or equal to)
Attack vector: remote (network-reachable)
Patched: 0.29.2 — 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.
A vulnerability (unclassified) exists in BookStack greater than or equal to.
Check the vendor advisory for the affected versions of BookStack greater than or equal to.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 0.29.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで BookStack greater than or equal to を使っているサービスとバージョンを洗い出す。
-
2Apply patch patch
Upgrade BookStack greater than or equal to to 0.29.2ステージング環境で 0.29.2 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。
-
3Post-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
References
- advisory bookstackapp.com
- advisory nvd.nist.gov
- web jvn.jp
- web github.com
- web github.com
- web bookstackapp.com