CVE-2023-4771
Published: 16 November 2023
Summary
CVE-2023-4771 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Cksource Ckeditor. Its CVSS base score is 6.1 (Medium).
Operationally, ranked in the top 4.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A Cross-Site Scripting vulnerability exists in CKSource CKEditor versions 4.15.1 and earlier. The flaw, tracked as CWE-79, resides in the /ckeditor/samples/old/ajax.html sample file and carries a CVSS 3.1 score of 6.1. An unauthenticated remote attacker can supply malicious JavaScript that executes in the context of an authorized user’s session, resulting in limited disclosure and modification of information with changed scope.
An attacker can exploit the issue by crafting a request that delivers JavaScript through the affected sample file. Successful exploitation allows retrieval of information belonging to an authorized user who interacts with the malicious payload, without requiring prior authentication on the attacker’s part.
Public advisories from INCIBE detail the vulnerability and are available at the referenced URLs. No specific patch or mitigation guidance is provided in the available references.
The EPSS score reached a peak of 0.2723 after disclosure before receding to its current value of 0.2231.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-0753
- 🇪🇸 INCIBE: www.incibe.es
Vulnerability details
A Cross-Site scripting vulnerability has been found in CKSource CKEditor affecting versions 4.15.1 and earlier. An attacker could send malicious javascript code through the /ckeditor/samples/old/ajax.html file and retrieve an authorized user's information.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.