CVE-2019-18952Xfilesharing Unrestricted File Upload
SibSoft Xfilesharing through 2.5.1 allows cgi-bin/up.cgi arbitrary file upload.
Published Nov 13, 2019 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2019-18952 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Xfilesharing (Sibsoft).
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Jan 12, 2022. No public exploit code is known.
- EPSS estimates a 45% probability of exploitation in the next 30 days.
- Fixed versions are available, including Xfilesharing <=2.5.1, Xfilesharing 2.5.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
45%
Higher than 98.7% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
44/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jan 12, 2022
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
10
Reports of active use
Description
SibSoft Xfilesharing through 2.5.1 allows cgi-bin/up.cgi arbitrary file upload. This can be combined with CVE-2019-18951 to achieve remote code execution via a .html file, containing short codes, that is served over HTTP.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Jan 12, 2022 | n/a | Not reported |
| Industry KEV feed | Jan 12, 2022 | n/a | Not reported |
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| XfilesharingSibsoft | See advisory | 2.5.1 |
Patched Releases
Xfilesharing
<=2.5.1
Timeline
Publicly disclosed
Nov 13, 2019
Added to CIRCL KEV
Jan 12, 2022
Added to Industry KEV feed
Jan 12, 2022
Last updated
Nov 21, 2024
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitpacketstormsecurity.com · Xfilesharing-2.5.1-Local-File-Inclusion-Shell-U…
- exploitVulnCheck exploitation report
FAQ
Common Questions.
SibSoft Xfilesharing through 2.5.1 allows cgi-bin/up.cgi arbitrary file upload.
Affected: Xfilesharing (Sibsoft). The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Jan 12, 2022.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Xfilesharing <=2.5.1, Xfilesharing 2.5.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2019-18952 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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