CWE · MITRE source
CWE-603Use of Client-Side Authentication
A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.
Client-side authentication is extremely weak and may be breached easily. Any attacker may read the source code and reverse-engineer the authentication mechanism to access parts of the application which would otherwise be protected.
Last updated: 04 July 2026 00:28 UTC
Cumulative inbound coverage
How completely the frameworks we cross-walk collectively cover this — the verdict is the strongest single mapping (overlapping partials are not summed); breadth shows the corroboration behind it.
Collective: full · 6 mapping(s) from 3 framework(s): ASVS 5.0 4 (mostly) · OWASP-Web 1 (full) · ATT&CK 1 (mostly)
NIST 800-53 r5 controls that address this weakness (0)AI
| Control | Title | Family | Why it addresses this CWE |
|---|---|---|---|
| No NIST controls proposed yet. | |||
MITRE ATT&CK techniques this weakness enables
Our own two-way CWE↔ATT&CK cross-walk — a direct mapping with no public source (the CWE→CAPEC→ATT&CK chain leaves most top weaknesses, incl. XSS and SQLi, mapped to nothing). Drafted by Grok and spot-checked by Claude Opus 4.8.
Direction: ← other covers this;
→ this covers other (F/M/P = full / mostly /
partial).
Top CVEs of this weakness type, ranked by Risk Priority
| CVE | Risk | CVSS | EPSS | Published |
|---|---|---|---|---|
CVE-2022-3218 | 8.0 | 9.8 | 0.7348 | 2022-09-19 |
CVE-2017-7909 | 7.0 | 9.8 | 0.0262 | 2017-05-06 |
CVE-2022-33139 | 7.0 | 9.8 | 0.0117 | 2022-06-21 |
CVE-2024-39375 | 7.0 | 9.8 | 0.0057 | 2024-06-27 |
CVE-2025-12868 | 7.0 | 9.8 | 0.0048 | 2025-11-10 |
CVE-2026-1363 | 7.0 | 9.8 | 0.0054 | 2026-01-23 |
CVE-2020-6988 UPD | 5.5 | 7.5 | 0.0389 | 2020-03-16 |
CVE-2020-7591 | 5.5 | 8.8 | 0.0146 | 2020-10-15 |
CVE-2021-43355 | 5.5 | 7.3 | 0.0098 | 2022-01-21 |
CVE-2024-28627 | 5.5 | 7.5 | 0.0043 | 2024-04-23 |
CVE-2024-45785 | 5.5 | 7.5 | 0.0043 | 2024-10-25 |
CVE-2025-24517 | 5.5 | 7.5 | 0.0079 | 2025-03-31 |
CVE-2025-62650 | 5.5 | 8.3 | 0.0048 | 2025-10-17 |
CVE-2025-61940 | 5.5 | 8.3 | 0.0029 | 2025-12-02 |
CVE-2025-30042 | 5.5 | 7.8 | 0.0009 | 2026-03-02 |
CVE-2020-27266 | 3.5 | 6.5 | 0.0058 | 2021-01-19 |
CVE-2024-52327 | 3.5 | 6.5 | 0.0046 | 2025-01-23 |
CVE-2025-62649 | 3.5 | 5.8 | 0.0049 | 2025-10-17 |
CVE-2026-8830 UPD | 3.5 | 4.3 | 0.0039 | 2026-05-19 |