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CVE-2016-9895

17
FAUCET Score

CVE-2016-9895 describes a vulnerability where event handlers on "marquee" elements could execute inline JavaScript despite a strict Content Security Policy (CSP), affecting Firefox, Firefox ESR, and Thunderbird versions prior to 50.1, 45.6, and 45.6 respectively. With a CVSS score of 6.1 (MEDIUM), this vulnerability requires user interaction (UI:R) and could lead to limited confidentiality and integrity impacts (C:L/I:L). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.84%
Probability of exploitation in next 30 days
EPSS Percentile
76.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0184 is in the 88th percentile among its peer group of 26,221 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, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:45.6.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:45.6.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:45.6.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:45.6.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:45.6.0-1.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:45.6.0-1.el7_3
View patch

Vendor Advisories (1)

redhatCVE-2016-9895Moderate

Mozilla: CSP bypass using marquee tag (MFSA 2016-94, MFSA 2016-95)

Dec 14, 2016

References

rhn.redhat.com / errata/RHSA-2016-2946.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-2973.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingPatchVendor Advisory
security.gentoo.org / glsa/201701-15
Third Party Advisory
debian.org / security/2017/dsa-3757
Third Party Advisory
mozilla.org / security/advisories/mfsa2016-94
Vendor Advisory
mozilla.org / security/advisories/mfsa2016-95
Vendor Advisory
mozilla.org / security/advisories/mfsa2016-96
Vendor Advisory
securityfocus.com / bid/94885
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037461
Third Party AdvisoryVDB Entry