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Case File

CVE-2021-33570

MEDIUM · CVSS 5.4 EPSS 3.56% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-25 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗ github.com ↗ github.com ↗
External Security References
packetstormsecurity.com ↗ packetstormsecurity.com ↗ exploit-db.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-33570
Severity
MEDIUM
CVSS
5.4
EPSS
3.56%

Original NVD Description

Postbird 0.8.4 allows stored XSS via the onerror attribute of an IMG element in any PostgreSQL database table. This can result in reading local files via vectors involving XMLHttpRequest and open of a file:/// URL, or discovering PostgreSQL passwords via vectors involving Window.localStorage and savedConnections.