CVE-2023-38490
Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 only affects Kirby sites that use the `Xml` data handler (e.g. `Data::decode($string, 'xml')`) or the `Xml::parse()` method in site or plugin code. The Kirby core does not use any of the affected methods. XML External Entities (XXE) is a little used feature in the XML markup language that allows to include data from external files in an XML structure. If the name of the external file can be controlled by an attacker, this becomes a vulnerability that can be abused for various system impacts like the disclosure of internal or confidential data that is stored on the server (arbitrary file disclosure) or to perform network requests on behalf of the server (server-side request forgery, SSRF). Kirby's `Xml::parse()` method used PHP's `LIBXML_NOENT` constant, which enabled the processing of XML external entities during the parsing operation. The `Xml::parse()` method is used in the `Xml` data handler (e.g. `Data::decode($string, 'xml')`). Both the vulnerable method and the data handler are not used in the Kirby core. However they may be used in site or plugin code, e.g. to parse RSS feeds or other XML files. If those files are of an external origin (e.g. uploaded by a user or retrieved from an external URL), attackers may be able to include an external entity in the XML file that will then be processed in the parsing process. Kirby sites that don't use XML parsing in site or plugin code are *not* affected. The problem has been patched in Kirby 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6. In all of the mentioned releases, the maintainers have removed the `LIBXML_NOENT` constant as processing of external entities is out of scope of the parsing logic. This protects all uses of the method against the described vulnerability.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.8
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- EPSS probability
- 18.07%
- CWE
- CWE-611, CWE-776
- Published
- 2023-07-27
- Last modified
- 2026-03-13
Affected products
- getkirby kirby
- getkirby kirby
- getkirby kirby
- getkirby kirby
- getkirby kirby
Weakness type
Related vulnerabilities
- CVE-2025-58360 — GeoServer is vulnerable to an Unauthenticated XML External Entities (XXE) attack via WMS GetMap feature
- CVE-2025-2776 — SysAid On-Prem <= 23.3.40 serverurl Proceessing XML External Entity Injection
- CVE-2025-2775 — SysAid On-Prem <= 23.3.40 Checkin Proceessing XML External Entity Injection
- CVE-2025-68493 — Apache Struts, Apache Struts: XXE vulnerability in outdated XWork component
- CVE-2025-11700 — N-central Multiple XXE Injection Vulnerabilities
- CVE-2025-2777 — SysAid On-Prem <= 23.3.40 lshw Proceessing XML External Entity Injection
- CVE-2025-30220 — GeoTools, GeoServer, and GeoNetwork XML External Entity (XXE) Processing Vulnerability in XSD schema handling
- CVE-2026-32251 — Tolgee has an XXE Injection in Translation Import