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CVE-2015-0807

18
FAUCET Score

CVE-2015-0807 describes a cross-site request forgery (CSRF) vulnerability in Mozilla Firefox, Firefox ESR, and Thunderbird. The flaw stems from improper handling of HTTP 30x redirects after a preflight request in the navigator.sendBeacon implementation, allowing attackers to bypass CORS access-control checks. With a CVSS score of 6.8, this vulnerability has a medium attack complexity and could lead to partial compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or Metasploit/Nuclei modules, though it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 36.0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
31.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:31.0:*:*:*:*:*:*:*
31.1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:31.1.0:*:*:*:*:*:*:*
31.1.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:31.1.1:*:*:*:*:*:*:*
31.3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:31.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 28th percentile among its peer group of 19,955 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

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

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:31.6.0-1.el7_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:31.6.0-2.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:31.6.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:31.6.0-2.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:31.6.0-1.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:31.6.0-2.el7_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: xulrunner-0:31.6.0-2.el7_1
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-0807Moderate

Mozilla: CORS requests should not follow 30x redirections after preflight (MFSA 2015-37)

Mar 31, 2015

References

lists.opensuse.org / opensuse-security-announce/2015-04/msg00003.html
lists.opensuse.org / opensuse-security-announce/2015-04/msg00006.html
lists.opensuse.org / opensuse-security-announce/2015-05/msg00012.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00031.html
rhn.redhat.com / errata/RHSA-2015-0766.html
rhn.redhat.com / errata/RHSA-2015-0771.html
bugzilla.mozilla.org / show_bug.cgi
security.gentoo.org / glsa/201512-10
debian.org / security/2015/dsa-3211
debian.org / security/2015/dsa-3212
mozilla.org / security/announce/2015/mfsa2015-37.html
Vendor Advisory
oracle.com / technetwork/topics/security/bulletinapr2015-2511959.html
securityfocus.com / bid/73457
securitytracker.com / id/1031996
securitytracker.com / id/1032000
ubuntu.com / usn/USN-2550-1
ubuntu.com / usn/USN-2552-1