Vulnerability Description
The ProBot bot through 2021-02-08 for Discord might allow attackers to interfere with the intended purpose of the "Send an image when a user joins the server" feature (or possibly have unspecified other impact) because the uploader web service allows double extensions (such as .html.jpg) with the text/html content type. NOTE: there may not be cases in which an uploader web service is customer controlled; however, the nature of the issue has substantial interaction with customer controlled configuration. NOTE: the vendor states "This is just an uploader (like any other one) which uploads files to cloud storage and accepts various file types. There is no kind of vulnerability and it won't compromise either the client side or the server side.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Probot | Bot | <= 2021-02-08 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/161347/Discord-Probot-Arbitrary-File-UploadExploitThird Party AdvisoryVDB Entry
- https://raw.githubusercontent.com/TheLastVvV/Vulnerability-Reports-and-CVE/main/ExploitThird Party Advisory
- http://packetstormsecurity.com/files/161347/Discord-Probot-Arbitrary-File-UploadExploitThird Party AdvisoryVDB Entry
- https://raw.githubusercontent.com/TheLastVvV/Vulnerability-Reports-and-CVE/main/ExploitThird Party Advisory
FAQ
What is CVE-2021-26918?
CVE-2021-26918 is a vulnerability with a CVSS score of 9.8 (CRITICAL). The ProBot bot through 2021-02-08 for Discord might allow attackers to interfere with the intended purpose of the "Send an image when a user joins the server" feature (or possibly have unspecified oth...
How severe is CVE-2021-26918?
CVE-2021-26918 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-26918?
Check the references section above for vendor advisories and patch information. Affected products include: Probot Bot.