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CVE-2020-28871

89
FAUCET Score

CVE-2020-28871 describes a critical remote code execution vulnerability in Monitorr v1.7.6m, specifically within the upload.php component, allowing unauthorized attackers to execute arbitrary code on the server. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network with no authentication or user interaction required, leading to complete compromise of confidentiality, integrity, and availability. Exploit code is publicly available through Metasploit modules and Nuclei templates, and it has garnered significant community discussion, indicating a high likelihood of active exploitation despite not being listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
1.7.6mCPE matchmatch criteria
cpe:2.3:a:monitorr:monitorr:1.7.6m:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
85.78%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Metasploit: Monitorr unauthenticated Remote Code Execution (RCE) · Nov 16, 2020
Nuclei: CVE-2020-28871 · Jul 20, 2021
This CVE's current EPSS score of 0.8579 is in the 99th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/163263/Monitorr-1.7.6m-Bypass-Information-Disclosure-Shell-Upload.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/170974/Monitorr-1.7.6-Shell-Upload.html
packetstormsecurity.com / files/171429/Monitorr-1.7.6m-1.7.7d-Remote-Code-Execution.html
lyhinslab.org / index.php/2020/09/12/how-the-white-box-hacking-works-authorization-bypass-and-remote-code-execution-in-monitorr-1-7-6
ExploitThird Party Advisory
exploit-db.com / exploits/48980
ExploitThird Party AdvisoryVDB Entry