XSS in Gryphonconnect Gryphon Tower
CVE-2021-20137
A reflected cross-site scripting vulnerability exists in the url parameter of the /cgi-bin/luci/site_access/ page on the Gryphon Tower router's web interface. An attacker could exploit this issue by tricking a user into following a specially crafted link, granting the attacker javascript execution in the context of the victim's browser.
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: 0.026 (84.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Gryphonconnect Gryphon Tower
- Gryphonconnect Gryphon Tower Firmware
- Gryphon Tower Router — versions <= 04.0004.12 (Current)
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.tenable.com/security/research/tra-2021-51 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-20137?
- CVE-2021-20137 is a medium-severity vulnerability in Gryphonconnect Gryphon Tower, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-12-09.
- How severe is CVE-2021-20137?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-20137 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.