CVE-2017-7783
CVSS v3
7.5
HIGH
EPSS Score
13.8 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
- CVE-2017-7783 Red Hat Product Security
Mozilla: DOS attack through long username in URL (MFSA 2017-18)
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.
Technical details
- Published
- 2018-06-11
- Exploit-DB
- EDB-43020
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