BASIS BBj < 25.00 Unauthenticated Arbitrary File Read RCE

published 2025-11-20 11 mo ago modified 2026-10-18 21 d ago also EUVD-2025-198301

cvss: 9.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

BASIS BBj versions prior to 25.00 contain a Jetty-served web endpoint that fails to properly validate or canonicalize input path segments. This allows unauthenticated directory traversal sequences to cause the server to read arbitrary system files accessible to the account running the service. Retrieved configuration artifacts may contain account credentials used for BBj Enterprise Manager; possession of these credentials enables administrative access and use of legitimate management functionality that can result in execution of system commands under the service account. Depending on the operating system and the privileges of the BBj service account, this issue may also allow access to other sensitive files on the host, including operating system or application data, potentially exposing additional confidential information.

Patch / fix

fixed in 1 links 1

BASIS International Ltd. BASIS BBj 25.00

myemail.constantcontact.com/BASIS-International-Ltd--releases-BBj---the-Barista--Appli… advisory

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 11 mo ago (2025-11-20)

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

BASIS International Ltd. BASIS BBj

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

myemail.constantcontact.com /BASIS-International-Ltd--releases-BBj---the-Barista--Application-Framework--and-AddonSoftware--by-Barista-ver
vendor-advisory, patch
vulncheck.com /advisories/basis-bbj-unauthenticated-arbitrary-file-read-rce
third-party-advisory

Sources

CVE List CVE-2025-34320
NVD CVE-2025-34320

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.

Summary