XSS in Leostream Connection Broker
CVE-2021-38157
LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user parameter. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- dgccpa.com (Third Party Advisory)
- leostream.com (Vendor Advisory)
- www.leostream.com/resources-2/product-lifecycle/ (Vendor Advisory)
- gist.github.com/erud1te-sec/5c85924cb78ba85af42e0b7b62a5ec91 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38157?
- CVE-2021-38157 is a medium-severity vulnerability in Leostream Connection Broker, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-06.
- How severe is CVE-2021-38157?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-38157 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.