Back
CVE-2021-33570
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…
Medium5.4EPSS 3.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 3.6% · top 11% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Weakness
Affected products
n/a
- affected n/a
References (8)
- https://github.com/Paxa/postbird/issues/132 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/Paxa/postbird/issues/133 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/Paxa/postbird/issues/134 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/Tridentsec-io/postbird (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/162831/Postbird-0.8.4-Cross-Site-Scripting-Local-File-Inclusion.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/162872/Postbird-0.8.4-XSS-LFI-Insecure-Data-Storage.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.exploit-db.com/exploits/49910 (opens in a new tab)x_refsource_MISCx_transferred
- https://tridentsec.io/blogs/postbird-cve-2021-33570/ (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-33570)Record last updated .