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CVE-2021-33570

MEDIUM
5.4
CVSS Score
Published: May 25, 2021 at 09:06 PM UTC
Updated: June 17, 2026 at 03:54 AM UTC
1 product affected across 1 vendorPostbird

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Severity
MEDIUM5.4
Exploit prediction
EPSS 4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/162831/Postbird-0.8.4-Cross-Site-Scripting-Local-File-Inclusion.html
x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/162872/Postbird-0.8.4-XSS-LFI-Insecure-Data-Storage.html
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/Paxa/postbird/issues/132
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/Paxa/postbird/issues/133
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/Paxa/postbird/issues/134
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/Tridentsec-io/postbird
x_refsource_MISCBroken LinkThird Party AdvisoryURL Repurposed
Source: [email protected]
https://tridentsec.io/blogs/postbird-cve-2021-33570/
x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
https://www.exploit-db.com/exploits/49910

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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