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Fencer Vulns
critical 9.6

CVE-2026-53649 json

Joro: Unauthenticated Cross-Origin Plugin Upload Leads to RCE

published 2026-07-08 4 mo ago modified 2026-09-09 1 mo ago also GHSA-xqhv-chqm-fhcc , GO-2026-5947 , EUVD-2026-70238

cvss
9.6
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 26%
public exploits
0
none known

Summary

Joro is a web exploitation framework. Prior to version 1.1.1, Joro's default proxy mode exposes a local API on 127.0.0.1:9090 that performs no authentication and applies a wildcard CORS policy. Because plugin uploads use the CORS-safelisted multipart/form-data content type, cross-origin JavaScript on any page the operator visits can reach privileged endpoints - including uploading a native plugin and triggering a restart - directly through the operator's browser, with no preflight or credentials. Since plugins execute on load, this yields unauthenticated remote code execution as the operator's user from a single page visit. This issue has been patched in version 1.1.1.

Patch / fix

  • go github.com/BishopFox/joro 0.0.0-20260601151442-5c0ca35db828
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
GitHub 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/BishopFox/joro
<0.0.0-20260601151442-5c0ca35db828
0.0.0-20260601151442-5c0ca35db828

Affected products

  • BishopFox joro

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-352 Cross-Site Request Forgery
  • CWE-434 Unrestricted Upload of File with Dangerous Type
  • CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains

References

Sources

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.