Vulnerability · CVE-2025-34320
BASIS BBj versions prior to 25.00 contain a Jetty-served web endpoint that fails to properly validate or canonicalize input path segments.
Published Nov 20, 2025 · catalog updated Jul 14, 2026 · BASIS International Ltd. BASIS BBj
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-34320. EPSS is 0.86%. Act only if a listed version of BASIS International Ltd. BASIS BBj is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.86%
- Remediation
- Version ranges on file
- Affected products
- vendor BASIS International Ltd. BASIS BBj 0 <25.00
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 opera
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor BASIS International Ltd. BASIS BBj 0 <25.000 <25.00
How to fix CVE-2025-34320
Upgrade
CVE-2025-34320 lists a fix boundary at 25.00. Compare the installed build with that boundary before you change production.
Version check
Seen in 0 <25.00
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-34320. EPSS is 0.86%. Act only if a listed version of BASIS International Ltd. BASIS BBj is installed.
Which versions are affected?
Compare what you have installed with BASIS International Ltd. BASIS BBj 0 <25.00 0 <25.00. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.86%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Nov 20, 2025 · EUVD
Detected
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; posses
Jul 14, 2026 · EUVD
Updated
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; posses
Sources
- CVE.orgVulnerability recordCVE-2025-34320
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-34320
30-day exploitation probability 0.86%
first.org - EUVDVulnerability recordEUVD-2025-198301
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 runnin
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 26, 2026
- CVE.orgOct 26, 2026
- EUVDOct 26, 2026