Security readout for executives and security teams
Plain-English summary
CVE-2020-13558 is a high-impact WebKitGTK flaw. If a user opens a specially crafted web page on a system using WebKitGTK 2.30.1, the browser engine can mishandle freed memory and allow code execution. The business risk is highest where vulnerable clients render untrusted web content.
Executive priority
Treat as high priority where vulnerable WebKitGTK is present in environments that process external web content. User interaction is required, but impact is full compromise of the affected process, so exposure discovery and vendor-guided patching should be scheduled promptly.
Technical view
The issue is a CWE-416 use-after-free in WebKitGTK 2.30.1 AudioSourceProviderGStreamer functionality. The CVSS 3.0 score is 8.8: network reachable, low complexity, no privileges required, but user interaction is required. Successful exploitation can affect confidentiality, integrity, and availability.
Likely exposure
Assets running WebKitGTK 2.30.1 that render untrusted web pages are the primary exposure. This may include browsers or applications that embed WebKitGTK, but the provided sources only name WebKitGTK 2.30.1 as affected.
Exploitation context
The provided sources describe exploitation through a specially crafted web page. The bundle does not indicate CISA KEV listing or active exploitation evidence, so active exploitation should not be assumed from these sources.
Researcher notes
Evidence is clear on vulnerability class, affected version, attack precondition, and CVSS impact. The provided bundle does not include exploit-in-the-wild evidence, proof-of-concept details, or exact fixed versions, so remediation should be tied to vendor advisories.
Mitigation direction
- Identify systems and applications using WebKitGTK 2.30.1.
- Review Talos and Gentoo advisories for vendor-specific remediation.
- Update WebKitGTK through supported vendor packages where guidance is available.
- Reduce exposure to untrusted web content until remediation is confirmed.
Validation and detection
- Inventory installed WebKitGTK versions on managed endpoints and images.
- Confirm whether affected applications render remote or untrusted web pages.
- Check package manager or vendor advisory status for applied fixes.
- Prioritize validation on user-facing desktop or embedded browsing workflows.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-13558 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1172CVE reference · x_refsource_MISC
- GLSA-202104-03CVE reference · vendor-advisory, x_refsource_GENTOO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.