CVE-2023-26843
Published: 25 April 2023
Summary
CVE-2023-26843 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Churchcrm Churchcrm. Its CVSS base score is 5.4 (Medium).
Operationally, ranked in the top 6.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
ChurchCRM version 4.5.3 is affected by a stored cross-site scripting vulnerability tracked as CVE-2023-26843 and CWE-79. The flaw resides in NoteEditor.php and permits remote injection of arbitrary web scripts or HTML, carrying a CVSS 5.4 score reflecting network attack vector, low attack complexity, low privileges required, and user interaction with changed scope.
An authenticated attacker with low privileges can supply malicious content through NoteEditor.php; once stored, the payload executes in the context of other users' sessions, enabling limited confidentiality and integrity impacts such as data exposure or unauthorized actions within the application.
Public references consist of GitHub disclosure entries and the ChurchCRM project repository, which document the issue but do not detail specific mitigation steps or patches. The associated EPSS values (current 0.1148, peak 0.1413) indicate moderate exploitation probability without evidence of a pronounced post-disclosure rise.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-30635
Vulnerability details
A stored Cross-site scripting (XSS) vulnerability in ChurchCRM 4.5.3 allows remote attackers to inject arbitrary web script or HTML via the NoteEditor.php.
- 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.