Vulnerability in phpmyadmin (UBUNTU-CVE-2021-21252)

Summary

Vulnerability in phpmyadmin (UBUNTU-CVE-2021-21252). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 1.19.3 or later.

Original description

The description as published by the source.

The jQuery Validation Plugin provides drop-in validation for your existing forms. It is published as an npm package "jquery-validation". jquery-validation before version 1.19.3 contains one or more regular expressions that are vulnerable to ReDoS (Regular Expression Denial of Service). This is fixed in 1.19.3.

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 UBUNTU-CVE-2021-21252 has been found in phpmyadmin.
Risk of unauthorized operations or information disclosure.
What to do: upgrade phpmyadmin to 1.19.3 or later.
If unsure, ask your IT team or search "phpmyadmin UBUNTU-CVE-2021-21252" on the vendor's site.

UBUNTU-CVE-2021-21252 (phpmyadmin)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.19.3 — 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 phpmyadmin.

📍 Affected scope

Check the vendor advisory for the affected versions of phpmyadmin.

🔥 Severity

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

🔧 How to fix

Update to 1.19.3.

🛡️ 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 'phpmyadmin' . 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 'phpmyadmin' . | 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 phpmyadmin 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 phpmyadmin to 1.19.3
```
ステージング環境で 1.19.3 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。