CVE-2017-7783 EXPLOIT
7.5
HIGH · CVSS 3.0 · EPSS 14.1% (pctl 96)
Patch early
A public exploit exists.
Description
If a long user name is used in a username/password combination in a site URL (such as " http://UserName:Password@example.com"), the resulting modal prompt will hang in a non-responsive state or crash, causing a denial of service. This vulnerability affects Firefox < 55.
Scoring
| CVSS | 7.5 (HIGH, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 14.12% — more likely to be exploited than 96% of all CVEs |
| Weakness | CWE-20 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2018-06-11 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| mozilla | firefox |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Mozilla Firefox < 55 - Denial of Service | 2017-10-20 |
References
- http://www.securityfocus.com/bid/100401
- http://www.securitytracker.com/id/1039124
- https://bugzilla.mozilla.org/show_bug.cgi?id=1360842
- https://www.exploit-db.com/exploits/43020/
- https://www.mozilla.org/security/advisories/mfsa2017-18/
- http://www.securityfocus.com/bid/100401
- http://www.securitytracker.com/id/1039124
- https://bugzilla.mozilla.org/show_bug.cgi?id=1360842
- https://www.exploit-db.com/exploits/43020/
- https://www.mozilla.org/security/advisories/mfsa2017-18/
→ the Explorer · watch your stack · NVD