CVE-2021-33570

medium

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.

References

Advisories
More

https://github.com/Paxa/postbird/issues/134

https://github.com/Paxa/postbird/issues/133

https://github.com/Paxa/postbird/issues/132

http://packetstormsecurity.com/files/162872/Postbird-0.8.4-XSS-LFI-Insecure-Data-Storage.html

https://www.exploit-db.com/exploits/49910

https://tridentsec.io/blogs/postbird-cve-2021-33570/

https://github.com/Tridentsec-io/postbird

http://packetstormsecurity.com/files/162831/Postbird-0.8.4-Cross-Site-Scripting-Local-File-Inclusion.html

Details

Source: Mitre, NVD

Published: 2021-05-25

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.01006