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CVE-2020-6827· NVD / CVE Program· CNA mozilla

When following a link that opened an intent://-schemed URL, causing a custom tab to be opened, Firefox for Android could be tricked into dis

Noroxi assessment

Priority: Monitor (action score 18/100)

  • 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: 0.76% (FIRST EPSS); higher than 54.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: MozillaFirefox (openSUSE:Leap 15.1) 68.7.0-lp151.2.42.1; MozillaFirefox (SUSE:HPE Helion OpenStack 8) 68.7.0-109.116.1; MozillaFirefox (SUSE:Linux Enterprise Module for Desktop Applications 15 SP1) 68.7.0-3.84.2.

Low priority for now. Upgrade to MozillaFirefox (openSUSE:Leap 15.1) 68.7.0-lp151.2.42.1; MozillaFirefox (SUSE:HPE Helion OpenStack 8) 68.7.0-109.116.1; MozillaFirefox (SUSE:Linux Enterprise Module for Desktop Applications 15 SP1) 68.7.0-3.84.2 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 following a link that opened an intent://-schemed URL, causing a custom tab to be opened, Firefox for Android could be tricked into displaying the incorrect URI. <br> *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.7.

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Apr 24, 2020
Updated
Jun 16, 2026
EPSS
0.7% · 54th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
mozillafirefox esr
googleandroid

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Affected versions

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

  • mozilla firefox esrbefore 68.7.0

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 ESR

    • unspecified and later · before 68.7affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.1MozillaFirefoxbefore 68.7.0-lp151.2.42.168.7.0-lp151.2.42.1
SUSE:HPE Helion OpenStack 8MozillaFirefoxbefore 68.7.0-109.116.168.7.0-109.116.1
SUSE:Linux Enterprise Module for Desktop Applications 15 SP1MozillaFirefoxbefore 68.7.0-3.84.268.7.0-3.84.2
SUSE:Linux Enterprise Server 11 SP4-LTSSMozillaFirefoxbefore 68.7.0-78.70.168.7.0-78.70.1

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-4127An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited.
    39Monitor
  • CVE-2023-6862A use-after-free was identified in the `nsDNSService::Init`.
    35Monitor
  • CVE-2023-25746Memory safety bugs present in Firefox ESR 102.7.
    35Monitor

Published before and after this one in the same product

  • Later →CVE-2020-6828Apr 24, 2020 · A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a file
    30Monitor
  • Later →CVE-2020-15649Aug 10, 2020 · Given an installed malicious file picker application, an attacker was able to steal and upload local files of their choosing, regardless of
    22Monitor
  • Later →CVE-2020-15650Aug 10, 2020 · Given an installed malicious file picker application, an attacker was able to overwrite local files and thus overwrite Firefox settings (but
    22Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
opensuse:MozillaFirefox68.7.0-lp151.2.42.1 · openSUSE:Leap 15.1Package registry (OSV)
suse:MozillaFirefox68.7.0-3.84.2 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP1Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-1021 · Improper Restriction of Rendered UI Layers or Frames

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

nvd-primary

Attack context

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (1 more)

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

All records