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CVE-2026-54720
medium
CVSS 5.4
Cross-Site Scripting (XSS) in silverstripe/framework (CVE-2026-54720)
Summary
cross-site scripting in silverstripe/framework (CVE-2026-54720). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `6.2.2` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-54720** has been found in silverstripe/framework.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: upgrade silverstripe/framework to **6.2.2** or later.
If unsure, ask your IT team or search "silverstripe/framework CVE-2026-54720" on the vendor's site.
CVE-2026-54720 (silverstripe/framework) — CWE-79 / CVSS v3 5.4
Attack vector: remote (network-reachable) / unauthenticated
Patched: `6.2.2` — 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.
❓ What is the problem
**Cross-site scripting (XSS)** (CWE-79) exists in silverstripe/framework.
📍 Affected scope
silverstripe/framework — .
🔥 Severity
Severity: Medium (CVSS 5.4/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **6.2.2**.
🛡️ 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 'silverstripe/framework' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'silverstripe/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 `silverstripe/framework` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade silverstripe/framework to 6.2.2ステージング環境で 6.2.2 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
composer
silverstripe/framework
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.2.2"}]}]
References
- web https://github.com/silverstripe/silverstripe-framework/security/advisories/GHSA-gvrw-qqp5-jgc5
- web https://www.silverstripe.org/download/security-releases/cve-2026-54720
- web https://nvd.nist.gov/vuln/detail/CVE-2026-54720
- web https://github.com/silverstripe/silverstripe-framework/pull/11993
- web https://github.com/silverstripe/silverstripe-framework/commit/1bcb02adfc365c6436dc26ab2f6dd32d97f3979b
- web https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2026-54720.yaml
- web https://github.com/silverstripe/silverstripe-framework/releases/tag/6.2.2
- web https://github.com/advisories/GHSA-gvrw-qqp5-jgc5