NVD / CVE Program· CNA mozilla

CVE-2017-7803: When a page's content security policy (CSP) header contains a "sandbox" directive, other directives are ignored.

HighCVSS 7.5 · v3.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.9% (FIRST EPSS); higher than 80.6% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: firefox-esr (Debian:12) 52.3.0esr-1; firefox-esr (Debian:7) 52.3.0esr-1~deb7u1; icedove (Debian:7) 1:52.3.0-4~deb7u1.

Low priority for now. Upgrade to firefox-esr (Debian:12) 52.3.0esr-1; firefox-esr (Debian:7) 52.3.0esr-1~deb7u1; icedove (Debian:7) 1:52.3.0-4~deb7u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

When a page's content security policy (CSP) header contains a "sandbox" directive, other directives are ignored. This results in the incorrect enforcement of CSP. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Pre-auth

Published: Jun 11, 2018
Updated: Jun 16, 2026
EPSS: 1.9% · 80th percentile
CWE: CWE-269

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 1.9%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
redhat	enterprise linux desktop	cpe:2.3:o:redhat:enterprise_linux_desktop
redhat	enterprise linux server	cpe:2.3:o:redhat:enterprise_linux_server
redhat	enterprise linux server aus	cpe:2.3:o:redhat:enterprise_linux_server_aus
redhat	enterprise linux server eus	cpe:2.3:o:redhat:enterprise_linux_server_eus
redhat	enterprise linux workstation	cpe:2.3:o:redhat:enterprise_linux_workstation
debian	debian linux	cpe:2.3:o:debian:debian_linux
mozilla	firefox	cpe:2.3:a:mozilla:firefox
mozilla	thunderbird	cpe:2.3:a:mozilla:thunderbird

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

Mozilla Firefox
- unspecified and later · before 55affected
Mozilla Firefox ESR
- unspecified and later · before 52.3affected
Mozilla Thunderbird
- unspecified and later · before 52.3affected

Affected versions · NVD (14)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

debian debian linux8.0
debian debian linux9.0
mozilla firefoxbefore 55.0
mozilla firefoxbefore 52.3.0
mozilla thunderbirdbefore 52.3.0
redhat enterprise linux desktop6.0
redhat enterprise linux desktop7.0
redhat enterprise linux server6.0
redhat enterprise linux server7.0
redhat enterprise linux server aus7.4
redhat enterprise linux server eus7.4
redhat enterprise linux server eus7.5
redhat enterprise linux workstation6.0
redhat enterprise linux workstation7.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	firefox-esr	before 52.3.0esr-1	52.3.0esr-1
Debian:7	firefox-esr	before 52.3.0esr-1~deb7u1	52.3.0esr-1~deb7u1
Debian:7	icedove	before 1:52.3.0-4~deb7u1	1:52.3.0-4~deb7u1
Debian:8	firefox-esr	before 52.3.0esr-1~deb8u2	52.3.0esr-1~deb8u2
Debian:8	icedove	before 1:52.3.0-4~deb8u2	1:52.3.0-4~deb8u2
Debian:9	firefox-esr	before 52.3.0esr-1~deb9u1	52.3.0esr-1~deb9u1
Debian:9	icedove	before 1:52.3.0-4~deb9u1	1:52.3.0-4~deb9u1
Red Hat:enterprise_linux:6::client	firefox	before 0:52.3.0-3.el6_9	0:52.3.0-3.el6_9
Red Hat:enterprise_linux:6::client	firefox-debuginfo	before 0:52.3.0-3.el6_9	0:52.3.0-3.el6_9
Red Hat:enterprise_linux:6::client	thunderbird	before 0:52.3.0-1.el6_9	0:52.3.0-1.el6_9
Red Hat:enterprise_linux:6::client	thunderbird-debuginfo	before 0:52.3.0-1.el6_9	0:52.3.0-1.el6_9
Red Hat:enterprise_linux:7::client	firefox	before 0:52.3.0-2.el7_4	0:52.3.0-2.el7_4
Red Hat:enterprise_linux:7::client	firefox-debuginfo	before 0:52.3.0-2.el7_4	0:52.3.0-2.el7_4
Red Hat:enterprise_linux:7::client	thunderbird	before 0:52.3.0-1.el7_4	0:52.3.0-1.el7_4
Red Hat:enterprise_linux:7::client	thunderbird-debuginfo	before 0:52.3.0-1.el7_4	0:52.3.0-1.el7_4
SUSE:Linux Enterprise Point of Sale 11 SP3	MozillaFirefox-branding-SLED	before 52-24.5.1	52-24.5.1
SUSE:Linux Enterprise Software Development Kit 11 SP4	MozillaFirefox	before 52.3.0esr-72.9.1	52.3.0esr-72.9.1
SUSE:OpenStack Cloud 6	MozillaFirefox	before 52.3.0esr-109.3.1	52.3.0esr-109.3.1
SUSE:Package Hub 12	MozillaThunderbird	before 52.3.0-42.1	52.3.0-42.1

Same product

redhat: all records

Other highest-scoring records for the same primary product.

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Published before and after this one in the same product

← EarlierCVE-2017-7758Jun 11, 2018 · An out-of-bounds read vulnerability with the Opus encoder when the number of channels in an audio stream changes while the encoder is in…
37Monitor
← EarlierCVE-2017-7762Jun 11, 2018 · When entered directly, Reader Mode did not strip the username and password section of URLs displayed in the addressbar.
31Monitor
Later →CVE-2017-7814Jun 11, 2018 · File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware…
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:firefox-esr	52.3.0esr-1 · Debian:12	Package registry (OSV)
debian:icedove	1:52.3.0-4~deb7u1 · Debian:7	Package registry (OSV)
red hat:firefox	0:52.3.0-3.el6_9 · Red Hat:enterprise_linux:6::client	Package registry (OSV)
red hat:firefox-debuginfo	0:52.3.0-3.el6_9 · Red Hat:enterprise_linux:6::client	Package registry (OSV)
red hat:thunderbird	0:52.3.0-1.el6_9 · Red Hat:enterprise_linux:6::client	Package registry (OSV)
red hat:thunderbird-debuginfo	0:52.3.0-1.el6_9 · Red Hat:enterprise_linux:6::client	Package registry (OSV)
suse:MozillaFirefox	52.3.0esr-72.9.1 · SUSE:Linux Enterprise Software Development Kit 11 SP4	Package registry (OSV)
suse:MozillaFirefox-branding-SLED	52-24.5.1 · SUSE:Linux Enterprise Point of Sale 11 SP3	Package registry (OSV)
suse:MozillaThunderbird	52.3.0-42.1 · SUSE:Package Hub 12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: High
Availability impact: None

Weakness class (CWE)

CWE-269 · Improper Privilege Management

CVSS vector

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

nvd-primary

Root cause

To simplify setup, a service account is granted broad, cluster-wide permissions. The principle of least privilege is skipped during installation.

The bug in code

The whole CWE-269 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

yaml

1kind: ClusterRole
2rules:
3  - apiGroups: ["*"]
4    resources: ["*"]
5    verbs: ["*"]

Fixed

yaml

1kind: Role
2metadata:
3  namespace: lodos-system
4rules:
5  - apiGroups: ["apps"]
6    resources: ["deployments"]
7    verbs: ["get", "list", "update"]

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Abuse Elevation Control MechanismT1548

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

www.securityfocus.com/bid/100234

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records