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NVD / CVE Program· CNA mozilla

CVE-2019-11721: The unicode latin 'kra' character can be used to spoof a standard 'k' character in the addressbar.

MediumCVSS 6.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 26/100)

  • 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: 1.3% (FIRST EPSS); higher than 72.7% 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: enigmail (openSUSE:Leap 15.0) 2.1.2-lp150.34.1; MozillaFirefox (openSUSE:Leap 15.0) 68.1.0-lp150.3.66.1; MozillaThunderbird (openSUSE:Leap 15.0) 68.1.1-lp150.3.51.1.

Low priority for now. Upgrade to enigmail (openSUSE:Leap 15.0) 2.1.2-lp150.34.1; MozillaFirefox (openSUSE:Leap 15.0) 68.1.0-lp150.3.66.1; MozillaThunderbird (openSUSE:Leap 15.0) 68.1.1-lp150.3.51.1 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

The unicode latin 'kra' character can be used to spoof a standard 'k' character in the addressbar. This allows for domain spoofing attacks as do not display as punycode text, allowing for user confusion. This vulnerability affects Firefox < 68.

Published
Jul 23, 2019
Updated
Jun 16, 2026
EPSS
1.3% · 72th percentile
CWE
—

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

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  • 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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  • when exploit code appears or is weaponized
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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
opensuseleap

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 68affected

Affected versions

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

  • mozilla firefoxbefore 68.0
  • opensuse leap15.0
  • opensuse leap15.1

Package-level exposure

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

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.0enigmailbefore 2.1.2-lp150.34.12.1.2-lp150.34.1
openSUSE:Leap 15.0MozillaFirefoxbefore 68.1.0-lp150.3.66.168.1.0-lp150.3.66.1
openSUSE:Leap 15.0MozillaThunderbirdbefore 68.1.1-lp150.3.51.168.1.1-lp150.3.51.1
openSUSE:Leap 15.1enigmailbefore 2.1.2-lp151.2.6.12.1.2-lp151.2.6.1
openSUSE:Leap 15.1MozillaFirefoxbefore 68.1.0-lp151.2.14.168.1.0-lp151.2.14.1
openSUSE:Leap 15.1MozillaThunderbirdbefore 68.1.1-lp151.2.13.168.1.1-lp151.2.13.1
SUSE:HPE Helion OpenStack 8MozillaFirefoxbefore 68.1.0-109.89.168.1.0-109.89.1
SUSE:HPE Helion OpenStack 8MozillaFirefox-branding-SLEbefore 68-32.8.168-32.8.1
SUSE:Linux Enterprise Module for Desktop Applications 15MozillaFirefoxbefore 68.1.0-3.54.268.1.0-3.54.2
SUSE:Linux Enterprise Module for Desktop Applications 15MozillaFirefox-branding-SLEbefore 68-4.8.568-4.8.5
SUSE:Linux Enterprise Workstation Extension 15MozillaThunderbirdbefore 68.1.1-3.51.168.1.1-3.51.1

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x…KEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the…KEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to…KEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2019-11719Jul 23, 2019 · When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger an out-of-bounds read in the…
    31Monitor
  • ← EarlierCVE-2019-11720Jul 23, 2019 · Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors.
    24Monitor
  • Later →CVE-2019-11723Jul 23, 2019 · A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context.
    30Monitor

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:enigmail2.1.2-lp150.34.1 · openSUSE:Leap 15.0Package registry (OSV)
opensuse:MozillaFirefox68.1.0-lp151.2.14.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:MozillaThunderbird68.1.1-lp150.3.51.1 · openSUSE:Leap 15.0Package registry (OSV)
suse:MozillaFirefox68.1.0-3.54.2 · SUSE:Linux Enterprise Module for Desktop Applications 15Package registry (OSV)
suse:MozillaFirefox-branding-SLE68-4.8.5 · SUSE:Linux Enterprise Module for Desktop Applications 15Package registry (OSV)
suse:MozillaThunderbird68.1.1-3.51.1 · SUSE:Linux Enterprise Workstation Extension 15Package 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.
  • A user must open a link or visit a page.
  • 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
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

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

All records