Budibase Arbitrary File Upload Leading to Multiple Critical Vulnerabilities (SSRF, Stored XSS)

published 2026-03-09 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-10355

cvss: 8.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits: 0; none known

Budibase is a low code platform for creating internal tools, workflows, and admin panels. In 3.24.0 and earlier, an arbitrary file upload vulnerability exists even though file extension restrictions are configured. The restriction is enforced only at the UI level. An attacker can bypass these restrictions and upload malicious files.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 8 mo ago (2026-03-09)

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Budibase/budibase/security/advisories/GHSA-2hfr-343j-863r referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
NVD	3.1	9.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Budibase budibase

Classification

Weakness

CWE-602 Client-Side Enforcement of Server-Side Security
CWE-79 Improper Neutralization of Input During Web Page Generation
CWE-918 Server-Side Request Forgery

References

github.com /Budibase/budibase/security/advisories/GHSA-2hfr-343j-863r
exploit, vendor-advisory

Sources

CVE List CVE-2026-25737
NVD CVE-2026-25737

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary