CVE-2024-39363
XSS in Wavlink Wl-Wn533A8 Firmware m33a8.v5030.210505
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2024-39363 is a critical-severity Basic XSS (CWE-80) vulnerability in Wavlink Wl-Wn533A8 Firmware. Its CVSS base score is 9.6 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked in the top 1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
A cross-site scripting vulnerability tracked as CVE-2024-39363 affects the login.cgi set_lang_CountryCode() function in Wavlink AC3000 firmware version M33A8.V5030.210505. The flaw, assigned CWE-80, permits an unauthenticated remote attacker to supply a specially crafted HTTP request that executes arbitrary script in the context of a victim's browser session and can disclose sensitive information. The issue carries a CVSS 3.1 score of 9.6 reflecting network attack vector, low complexity, no required privileges, and required user interaction with changed scope and high impact on confidentiality, integrity, and availability.
An unauthenticated attacker can exploit the vulnerability simply by inducing a victim to visit a malicious link or by delivering a crafted request that the target device processes during login handling. Successful exploitation results in theft of session tokens, credentials, or other sensitive data exposed within the administrative interface.
Public references point to detailed analysis published by Cisco Talos under TALOS-2024-2017, which describes the technical root cause and reproduction steps but does not include vendor-supplied patches or mitigation guidance in the available information. The associated EPSS score has remained flat at 0.1065 with no observed increase since disclosure.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38366
Vulnerability Data
A cross-site scripting (xss) vulnerability exists in the login.cgi set_lang_CountryCode() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to a disclosure of sensitive information. An attacker can make an unauthenticated HTTP request to trigger this vulnerability.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation can discover missing or incorrect neutralization of script tags through targeted XSS test cases.
Input validation explicitly requires checking and neutralizing untrusted web inputs containing script-related characters before they reach a downstream renderer.
Secure engineering principles include mandatory output encoding and neutralization of HTML metacharacters to stop injection at the source.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require output encoding and input validation that prevent basic XSS.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.