Skip to main content
ExploitedIn CISA KEVFix available

CVE-2021-1789

Exploitation confirmed. First attested on 2022-05-04 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2021-04-02
  • Fixed in2.30.6
  • WeaknessCWE-843

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

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Timeline

dates in UTC
  1. 2021-04-0218:15CVE publishedNVD
  2. 2022-05-04Added to the CISA KEV catalogCISA KEV
  3. 2022-05-04Listed as exploited by GCVEGCVE
  4. 2022-05-04Exploitation first reportedCISA KEV
  5. 2025-01-2917:34SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 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-2021-1789?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-1789?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Webkitgtk
BranchAffectedFixed in
2.30< 2.30.62.30.6
Apple mac os x
BranchAffectedFixed in
10.15≥ 10.15, < 10.15.710.15.7
10.14≥ 10.14, < 10.14.610.14.6
10.14= 10.14.6no fix published
10.15= 10.15.7no fix published
Fedoraproject fedora
BranchAffectedFixed in
32.x= 32no fix published
33.x= 33no 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.

Products declared by the CNA5 products

As apple, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apple iOS and iPadOS
    Affected
    • < 14.4fixed in 14.4custom
  • Apple macOS
    Affected
    • < 11.2fixed in 11.2custom
  • Apple macOS
    Affected
    • < 7.3fixed in 7.3custom
  • Apple macOS
    Affected
    • < 14.4fixed in 14.4custom
  • Apple macOS
    Affected
    • < 14.0fixed in 14.0custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2021-05-01

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • accountsserviceRocky Linux:8all versions · fixed in 0:0.6.55-2.el8
  • accountsserviceAlmaLinux:8all versions · fixed in 0.6.55-2.el8and 2 other packages
  • gdmRocky Linux:8all versions · fixed in 1:40.0-15.el8
  • gdmAlmaLinux:8all versions · fixed in 1:40.0-15.el8
  • gnome-autoarRocky Linux:8all versions · fixed in 0:0.2.3-2.el8
  • gnome-autoarRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:0.2.3-2.el8and 2 other packages
  • gnome-autoarAlmaLinux:8all versions · fixed in 0.2.3-2.el8
  • gnome-calculatorRocky Linux:8all versions · fixed in 0:3.28.2-2.el8

85 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-1789 Red Hat Product Security59 products fixed · 9 known affected

    webkitgtk: Type confusion issue leading to arbitrary code execution

    webkitgtk as a component of Red Hat Enterprise Linux 6 · webkitgtk-devel as a component of Red Hat Enterprise Linux 6 · webkitgtk-doc as a component of Red Hat Enterprise Linux 6 · +6 more

  • RHSA-2025:10364 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: webkitgtk4 security update

  • RHSA-2021:4381 Red Hat Product Security46 products fixed

    Red Hat Security Advisory: GNOME security, bug fix, and enhancement update

Full record on NVD

Fix

  1. Update Webkitgtk to 2.30.6
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-05-25
  3. Vendor fix Red Hat Product Security RHSA-2025:10364 · 13 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2021:4381 · 46 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect. The GNOME session must be restarted (log out, then log back in) for this update to take effect.
  5. No fix planned, says the vendor Red Hat Product Security CVE-2021-1789 · 9 productsOut of support scope

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
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-05-04
Patch Due Date
2022-05-25
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-04-02
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-c838-pj7m-89q4

Frequently asked questions

What is CVE-2021-1789?

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Is CVE-2021-1789 actively exploited?

Yes. CVE-2021-1789 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-25.

What is the CVSS score for CVE-2021-1789?

CVE-2021-1789 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Running webkitgtk? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, May 2022Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record