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No exploitation reportedFix available

CVE-2017-7814

No exploitation reported by the sources we read.

  • Published2018-06-11
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Timeline

dates in UTC
  1. 2018-06-1121:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-7814?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7814?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
7.0= 7.0no fix published
8.0= 8.0no fix published
9.0= 9.0no fix published
Mozilla firefox
BranchAffectedFixed in
56.0< 56.056.0
52.4< 52.4.052.4.0
Redhat enterprise linux desktop
BranchAffectedFixed in
6.0= 6.0no fix published
7.0= 7.0no fix published

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.07.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • NVDweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score1.2 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2018-06-11
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2017-7814?

File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Is CVE-2017-7814 actively exploited?

Active exploitation of CVE-2017-7814 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7814?

CVE-2017-7814 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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