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CVE-2021-29625

Cross-Site Scripting (XSS) in vrana/adminer (CVE-2021-29625)

Summary

Cross-site scripting in vrana/adminer (CVE-2021-29625). Risk of unauthorized operations or information disclosure. Exploitable via pdo_. Mitigation: upgrade to 4.8.1 or later.

Original description

The description as published by the source.

Adminer is open-source database management software. A cross-site scripting vulnerability in Adminer versions 4.6.1 to 4.8.0 affects users of MySQL, MariaDB, PgSQL and SQLite. XSS is in most cases prevented by strict CSP in all modern browsers. The only exception is when Adminer is using a pdo_ extension to communicate with the database (it is used if the native extensions are not enabled). In browsers without CSP, Adminer versions 4.6.1 to 4.8.0 are affected. The vulnerability is patched in version 4.8.1. As workarounds, one can use a browser supporting strict CSP or enable the native PHP extensions (e.g. mysqli) or disable displaying PHP errors (display_errors).

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-2021-29625 has been found in vrana/adminer.
Attackers can target a specific entry point like pdo_ over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade vrana/adminer to 4.8.1 or later.
If unsure, ask your IT team or search "vrana/adminer CVE-2021-29625" on the vendor's site.

CVE-2021-29625 (vrana/adminer) — CWE-79
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: pdo_ / mysqli / display_errors
Patched: 4.8.1 — 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 vrana/adminer. Attackers reach the vulnerable code path via pdo_ without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of vrana/adminer. Attack surface: pdo_ / mysqli / display_errors.

🔥 Severity

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

🔧 How to fix

Update to 4.8.1.

🛡️ 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 'vrana/adminer' . 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 'vrana/adminer' . | 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 vrana/adminer 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 vrana/adminer to 4.8.1

    ステージング環境で 4.8.1 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

Packagist vrana/adminer
[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.8"},{"fixed":"4.8.1"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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