Unauthenticated stored XSS via unsanitized client hostnames
Published Mar 26, 2021 · Updated Aug 3, 2024
Stored XSS in five TP-Link router and access-point firmware builds allows remote attackers to execute scripts via a client hostname. The setDefaultHostname() path accepts a wireless client's crafted hostname, stores it as plain text in ACT stack data, and renders it without sanitization in DHCP, ARP, and client-list pages. Exploitation requires a client to join the device and an authenticated administrator to open an affected management page; the script then runs in that administrator's browser context.
Summary
What happened
Stored XSS in five TP-Link router and access-point firmware builds allows remote attackers to execute scripts via a client hostname. The setDefaultHostname() path accepts a wireless client's crafted hostname, stores it as plain text in ACT stack data, and renders it without sanitization in DHCP, ARP, and client-list pages. Exploitation requires a client to join the device and an authenticated administrator to open an affected management page; the script then runs in that administrator's browser context.
The record
- CVE
- CVE-2021-3275
- Published
- Mar 26, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 26, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- CVE-2021-3275 hostname XSS proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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