XSS in Cisco Small Business 220 Series Smart Plus Switches
CVE-2021-1543
Multiple vulnerabilities in the web-based management interface of Cisco Small Business 220 Series Smart Switches could allow an attacker to do the following: Hijack a user session Execute arbitrary commands as a root user on the underlying operating system Conduct a cross-site scripting (XSS) attack Conduct an HTML injection attack For more information about these vulnerabilities, see the Details section of this advisory.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.093 (95.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.093 · newest: 0.093 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ciscosb-… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-1543?
- CVE-2021-1543 is a high-severity vulnerability in Cisco Small Business 220 Series Smart Plus Switches, classified under Improper Authentication. CVSS score: 7.2/10. Published 2021-06-16.
- How severe is CVE-2021-1543?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2021-1543 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.