WebKit WebKitGTK 2.30.4 Event use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in WebKit WebKitGTK 2.30.4. It has been rated as critical. This vulnerability affects unknown code of the component Event Handler. The manipulation leads to use after free. This vulnerability is referenced as CVE-2021-21775. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in WebKit WebKitGTK 2.30.4 (Web Browser) and classified as critical. This issue affects an unknown function of the component Event Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was published 07/08/2021 as TALOS-2021-1229. It is possible to read the advisory at talosintelligence.com. The identification of this vulnerability is CVE-2021-21775. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 241427 (RHEL 7 : webkitgtk4 (RHSA-2025:10364)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (241427). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 241427
Nessus Name: RHEL 7 : webkitgtk4 (RHSA-2025:10364)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/04/2021 🔍
07/08/2021 +184 days 🔍
07/08/2021 +0 days 🔍
07/10/2025 +1463 days 🔍

Sourcesinfo

Advisory: TALOS-2021-1229
Status: Not defined

CVE: CVE-2021-21775 (🔍)
GCVE (CVE): GCVE-0-2021-21775
GCVE (VulDB): GCVE-100-178115

Entryinfo

Created: 07/08/2021 10:26
Updated: 07/10/2025 13:15
Changes: 07/08/2021 10:26 (38), 07/11/2021 07:37 (2), 07/10/2025 13:15 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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