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TI-2021-13730 Aliases CVE-2021-34731GHSA-g8rc-p2f3-v3x7

Cisco Prime Access Registrar Stored Cross-Site Scripting Vulnerability

Priority LOW 23CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

A vulnerability in the web-based management interface of Cisco Prime Access Registrar could allow an authenticated, remote attacker to perform a stored cross-site scripting attack on an affected system. This vulnerability exists because the web-based management interface does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker would need valid administrative credentials. Cisco expects to release software updates that address this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00594 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Prime Access Registrarall versions—No fix listedCNA
  • Cisco Prime Access Registrar VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:prime_access_registrar:*:*:*:*:*:*:*:*before 9.2.1VulnerableCisco
  • cpe:2.3:a:cisco:prime_access_registrar:*:*:*:*:*:*:*:* Versions before 9.2.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34731
  2. 2026-10-03 Alias added: GHSA-g8rc-p2f3-v3x7

References

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2018-00380 Cisco Prime Access Registrar Denial of Service Vulnerability CVSS 3.0HIGH 8.6
  • TI-2022-05185 Cisco Prime Access Registrar Appliance Cross-Site Scripting Vulnerability CVSS 3.1MEDIUM 5.5

Sources