VDB-176879 · CVE-2021-26828 · EUVD-2021-13613

OpenPLC ScadaBR JSP File view_edit.shtm unrestricted upload

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in OpenPLC ScadaBR and classified as critical. Affected is an unknown function of the file view_edit.shtm of the component JSP File Handler. The manipulation leads to unrestricted upload. This vulnerability is traded as CVE-2021-26828. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OpenPLC ScadaBR (SCADA Software) (the affected version unknown). This issue affects an unknown part of the file view_edit.shtm of the component JSP File Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability.

The weakness was shared 06/11/2021. It is possible to read the advisory at forum.scadabr.com.br. The identification of this vulnerability is CVE-2021-26828. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

The exploit is available at packetstormsecurity.com. It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 12/03/2025 with a due date of 12/24/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2021-13613). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

SCADA Software

Vendor

OpenPLC

Name

ScadaBR

CPE 2.3info

CPE 2.2info

Video

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/05/2021 🔍
06/11/2021 +125 days 🔍
06/11/2021 +0 days 🔍
12/04/2025 +1637 days 🔍

Sourcesinfo

Advisory: forum.scadabr.com.br
Status: Confirmed

CVE: CVE-2021-26828 (🔍)
GCVE (CVE): GCVE-0-2021-26828
GCVE (VulDB): GCVE-100-176879
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/11/2021 23:23
Updated: 12/04/2025 08:51
Changes: 06/11/2021 23:23 (38), 06/13/2021 17:49 (2), 06/19/2024 06:04 (23), 12/03/2025 21:26 (19), 12/03/2025 21:54 (14), 12/04/2025 08:51 (1)
Complete: 🔍
Cache ID: 216::103