CVE intelligence and bounded remediation

CVE-2025-4012 — A vulnerability was found in playeduxyz PlayEdu 开源培训系统 up to 1.8 and classified as problematic

High CVSS 7.5

A vulnerability was found in playeduxyz PlayEdu 开源培训系统 up to 1.8 and classified as problematic. This issue affects some unknown processing of the file /api/backend/v1/user/create of the component User Avatar Handler. The manipulation of the argument Avatar leads to server-side request forgery. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Severity
High
CVSS
7.5 (3.1)
Published
2025-04-28
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-918

Affected products

  • playeduos / playedu

Matched remediation archetype

Server-side request forgery and unintended proxying

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Inventory server-side URL fetchers, webhooks, importers, previews, redirects, proxies, and protocol handlers reachable from untrusted input.
  • Map egress paths to internal services, metadata endpoints, loopback, private address space, and privileged control planes.
  • Review DNS resolution, redirect, proxy, credential-forwarding, and URL parsing behavior without requesting sensitive targets.

Remediate safely

  • Replace arbitrary destinations with named integrations or a strict allowlist of schemes, hosts, ports, and paths.
  • Resolve and validate every destination and redirect hop, then enforce egress policy independently of application checks.
  • Remove ambient credentials and sensitive headers from fetchers; apply response size, time, and content limits.

Authoritative sources

Complete CVE record and remediation plan

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