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NVD / CVE Program· CNA Chrome

CVE-2020-6391: Insufficient validation of untrusted input in Blink in Google Chrome prior to 80.0.3987.87 allowed a local attacker to bypass content…

MediumCVSS 4.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 17/100)

  • 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 71.4% 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: chromium (Debian:10) 80.0.3987.132-1~deb10u1; chromium (Debian:12) 80.0.3987.106-1; chromium (openSUSE:Leap 15.1) 80.0.3987.87-lp151.2.63.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to chromium (Debian:10) 80.0.3987.132-1~deb10u1; chromium (Debian:12) 80.0.3987.106-1; chromium (openSUSE:Leap 15.1) 80.0.3987.87-lp151.2.63.1 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

Insufficient validation of untrusted input in Blink in Google Chrome prior to 80.0.3987.87 allowed a local attacker to bypass content security policy via a crafted HTML page.

Published
Feb 11, 2020
Updated
Jun 16, 2026
EPSS
1.3% · 71th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 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 you'll hear from us

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  • 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
googlechrome
opensusebackports sle
fedoraprojectfedora
debiandebian linux
susepackage hub
suselinux enterprise
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux workstation

Limit the impact of XSS

This is a cross-site scripting (XSS) vulnerability. A well-configured Content-Security-Policy doesn't fix it, but greatly reduces its impact. Check your site's CSP and other security headers for free.

Check security headers

Versions reported by the vendor

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

  • Google Chrome

    • unspecified and later · before 80.0.3987.87affected
Affected versions · NVD (10)

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

  • debian debian linux10.0
  • debian debian linux9.0
  • fedoraproject fedora30
  • fedoraproject fedora31
  • google chromebefore 80.0.3987.87
  • opensuse backports sle15.0
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux workstation6.0
  • suse package huball versions

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:10chromiumbefore 80.0.3987.132-1~deb10u180.0.3987.132-1~deb10u1
Debian:12chromiumbefore 80.0.3987.106-180.0.3987.106-1
openSUSE:Leap 15.1chromiumbefore 80.0.3987.87-lp151.2.63.180.0.3987.87-lp151.2.63.1
Red Hat:rhel_extras:6chromium-browserbefore 0:80.0.3987.87-1.el6_100:80.0.3987.87-1.el6_10
Red Hat:rhel_extras:6chromium-browser-debuginfobefore 0:80.0.3987.87-1.el6_100:80.0.3987.87-1.el6_10
SUSE:Package Hub 12chromiumbefore 80.0.3987.87-31.180.0.3987.87-31.1
SUSE:Package Hub 12re2before 20200101-25.120200101-25.1
SUSE:Package Hub 15 SP1chromiumbefore 80.0.3987.87-bp151.3.59.180.0.3987.87-bp151.3.59.1

Same product

google: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-4863Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of…KEV
    95Now
  • CVE-2021-21224Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a…KEV
    90Now
  • CVE-2018-17463Incorrect side effect annotation in V8 in Google Chrome prior to 70.0.3538.64 allowed a remote attacker to execute arbitrary code inside a…KEV
    90Now

Published before and after this one in the same product

  • ← EarlierCVE-2020-6389Feb 11, 2020 · Out of bounds write in WebRTC in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to potentially exploit heap corruption via a…
    36Monitor
  • ← EarlierCVE-2020-6390Feb 11, 2020 · Out of bounds memory access in streams in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to potentially exploit heap…
    36Monitor
  • Later →CVE-2020-6392Feb 11, 2020 · Insufficient policy enforcement in extensions in Google Chrome prior to 80.0.3987.87 allowed an attacker who convinced a user to install a…
    17Monitor

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
debian:chromium80.0.3987.106-1 · Debian:12Package registry (OSV)
opensuse:chromium80.0.3987.87-lp151.2.63.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:chromium-browser0:80.0.3987.87-1.el6_10 · Red Hat:rhel_extras:6Package registry (OSV)
red hat:chromium-browser-debuginfo0:80.0.3987.87-1.el6_10 · Red Hat:rhel_extras:6Package registry (OSV)
suse:chromium80.0.3987.87-bp151.3.59.1 · SUSE:Package Hub 15 SP1Package registry (OSV)
suse:re220200101-25.1 · SUSE:Package Hub 12Package 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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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
low · 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
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

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

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

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

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

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

ATT&CK techniques

—

References

Show all references (7 more)

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

All records