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CVE-2015-0799

14
FAUCET Score

CVE-2015-0799 is a medium-severity vulnerability affecting Mozilla Firefox versions prior to 37.0.1, as well as various Canonical and OpenSUSE distributions. It allows man-in-the-middle attackers to bypass X.509 certificate verification for SSL servers through the HTTP Alternative Services feature. The attack requires medium complexity and could lead to data integrity compromise, but not confidentiality or availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
14.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
13.1CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 28th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

Vendor Advisories (1)

redhatCVE-2015-0799Important

Mozilla: Certificate verification bypass through the HTTP/2 Alt-Svc header (MFSA 2015-44)

Apr 3, 2015

References

lists.opensuse.org / opensuse-security-announce/2015-04/msg00003.html
bugzilla.mozilla.org / show_bug.cgi
security.gentoo.org / glsa/201512-10
mozilla.org / security/announce/2015/mfsa2015-44.html
Vendor Advisory
oracle.com / technetwork/topics/security/bulletinapr2016-2952098.html
securitytracker.com / id/1032030
ubuntu.com / usn/USN-2557-1