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CVE-2017-7815

18
FAUCET Score

CVE-2017-7815 describes a spoofing vulnerability in Mozilla Firefox versions prior to 56, specifically impacting installations with e10 multiprocess disabled. An attacker could leverage the "data:" protocol within an iframe to create a JavaScript-generated modal dialog, displaying an arbitrary domain as its origin to the user. This vulnerability has a CVSS v3 score of 5.3 (Medium), indicating a network-based attack with low impact on integrity and no impact on confidentiality or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 55.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 56CPE match
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.16%
Probability of exploitation in next 30 days
EPSS Percentile
63.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0116 is in the 41st percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

References

bugzilla.mozilla.org / show_bug.cgi
ExploitIssue Tracking
mozilla.org / security/advisories/mfsa2017-21
Vendor Advisory
securityfocus.com / bid/101057
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039465
Third Party AdvisoryVDB Entry