CVE-2020-10221
HighExploitedPublic exploitlib/ajaxHandlers/ajaxAddTemplate.php in rConfig through 3.94 allows remote attackers to execute arbitrary OS commands via shell metacharacters in the fileName POST parameter.
Published Mar 8, 2020 · Updated Nov 7, 2025
Key Facts
Patch immediately- CVE-2020-10221 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Rconfig.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 3, 2021. Public exploit code is available.
- EPSS estimates a 77% probability of exploitation in the next 30 days.
- Fixed versions are available, including Rconfig <=3.9.4, Rconfig 3.9.4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
77%
Higher than 99.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2020-10221 brief as a PDF
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Description
lib/ajaxHandlers/ajaxAddTemplate.php in rConfig through 3.94 allows remote attackers to execute arbitrary OS commands via shell metacharacters in the fileName POST parameter.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Nov 3, 2021 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| RconfigRconfig | See advisory | 3.9.4 |
Patched Releases
Rconfig
<=3.9.4
Timeline
Publicly disclosed
Mar 8, 2020
Added to CISA KEV
Nov 3, 2021
Added to Industry KEV feed
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Nov 7, 2025
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryhttps://cwe.mitre.org/data/definitions/78.html
- exploithttp://packetstormsecurity.com/files/156687/rConfig-3.93-Authenticated-Remote-Code-Execution.html
- exploithttps://engindemirbilek.github.io/rconfig-3.93-rce
- exploithttps://github.com/EnginDemirbilek/EnginDemirbilek.github.io/blob/master/rconfig-3.93-rce.html
- exploitVulnCheck exploitation report
FAQ
Common Questions.
lib/ajaxHandlers/ajaxAddTemplate.php in rConfig through 3.94 allows remote attackers to execute arbitrary OS commands via shell metacharacters in the fileName POST parameter.
Affected: Rconfig. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 3, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including Rconfig <=3.9.4, Rconfig 3.9.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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