Security Vulnerabilities, CVEs, Published In 2021
CVE-2021-45046
Known exploited
Public exploit
Used for ransomware
It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.
Max CVSS
9.0
EPSS Score
97.36%
Published
2021-12-14
Updated
2023-10-26
CISA KEV Added
2023-05-01
CVE-2021-44529
Known exploited
Public exploit
A code injection vulnerability in the Ivanti EPM Cloud Services Appliance (CSA) allows an unauthenticated user to execute arbitrary code with limited permissions (nobody).
Max CVSS
9.8
EPSS Score
97.07%
Published
2021-12-08
Updated
2024-03-26
CISA KEV Added
2024-03-25
CVE-2021-44228
Known exploited
Public exploit
Used for ransomware
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
Max CVSS
10.0
EPSS Score
97.56%
Published
2021-12-10
Updated
2023-04-03
CISA KEV Added
2021-12-10
CVE-2021-44077
Known exploited
Public exploit
Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014 are vulnerable to unauthenticated remote code execution. This is related to /RestAPI URLs in a servlet, and ImportTechnicians in the Struts configuration.
Max CVSS
9.8
EPSS Score
97.38%
Published
2021-11-29
Updated
2022-07-12
CISA KEV Added
2021-12-01
CVE-2021-43798
Public exploit
Grafana is an open-source platform for monitoring and observability. Grafana versions 8.0.0-beta1 through 8.3.0 (except for patched versions) iss vulnerable to directory traversal, allowing access to local files. The vulnerable URL path is: `<grafana_host_url>/public/plugins//`, where is the plugin ID for any installed plugin. At no time has Grafana Cloud been vulnerable. Users are advised to upgrade to patched versions 8.0.7, 8.1.8, 8.2.7, or 8.3.1. The GitHub Security Advisory contains more information about vulnerable URL paths, mitigation, and the disclosure timeline.
Max CVSS
7.5
EPSS Score
97.47%
Published
2021-12-07
Updated
2022-04-12
CVE-2021-42847
Public exploit
Zoho ManageEngine ADAudit Plus before 7006 allows attackers to write to, and execute, arbitrary files.
Max CVSS
9.8
EPSS Score
12.36%
Published
2021-11-11
Updated
2023-05-09
CVE-2021-42840
Public exploit
SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.
Max CVSS
9.0
EPSS Score
7.33%
Published
2021-10-22
Updated
2021-11-30
CVE-2021-42362
Public exploit
The WordPress Popular Posts WordPress plugin is vulnerable to arbitrary file uploads due to insufficient input file type validation found in the ~/src/Image.php file which makes it possible for attackers with contributor level access and above to upload malicious files that can be used to obtain remote code execution, in versions up to and including 5.3.2.
Max CVSS
8.8
EPSS Score
96.09%
Published
2021-11-17
Updated
2023-11-22
CVE-2021-42321
Known exploited
Public exploit
Used for ransomware
Microsoft Exchange Server Remote Code Execution Vulnerability
Max CVSS
8.8
EPSS Score
96.51%
Published
2021-11-10
Updated
2023-12-28
CISA KEV Added
2021-11-17
CVE-2021-42258
Known exploited
Public exploit
Used for ransomware
BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution, as exploited in the wild in October 2021 for ransomware installation. SQL injection can, for example, use the txtID (aka username) parameter. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.
Max CVSS
9.8
EPSS Score
97.40%
Published
2021-10-22
Updated
2021-10-28
CISA KEV Added
2021-11-03
CVE-2021-42237
Known exploited
Public exploit
Used for ransomware
Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.
Max CVSS
10.0
EPSS Score
97.55%
Published
2021-11-05
Updated
2021-12-03
CISA KEV Added
2022-03-25
CVE-2021-42013
Known exploited
Public exploit
Used for ransomware
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
Max CVSS
9.8
EPSS Score
97.40%
Published
2021-10-07
Updated
2023-08-31
CISA KEV Added
2021-11-03
CVE-2021-41773
Known exploited
Public exploit
Used for ransomware
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
Max CVSS
7.5
EPSS Score
97.46%
Published
2021-10-05
Updated
2022-10-28
CISA KEV Added
2021-11-03
CVE-2021-40539
Known exploited
Public exploit
Used for ransomware
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
Max CVSS
9.8
EPSS Score
97.50%
Published
2021-09-07
Updated
2021-11-29
CISA KEV Added
2021-11-03
CVE-2021-40449
Known exploited
Public exploit
Used for ransomware
Win32k Elevation of Privilege Vulnerability
Max CVSS
7.8
EPSS Score
0.15%
Published
2021-10-13
Updated
2023-08-01
CISA KEV Added
2021-11-17
CVE-2021-40444
Known exploited
Public exploit
Used for ransomware
<p>Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.</p>
<p>An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p>
<p>Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”.</p>
<p>Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.</p>
<p>Please see the <strong>Mitigations</strong> and <strong>Workaround</strong> sections for important information about steps you can take to protect your system from this vulnerability.</p>
<p><strong>UPDATE</strong> September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.</p>
Max CVSS
8.8
EPSS Score
96.82%
Published
2021-09-15
Updated
2023-12-28
CISA KEV Added
2021-11-03
CVE-2021-39352
Public exploit
The Catch Themes Demo Import WordPress plugin is vulnerable to arbitrary file uploads via the import functionality found in the ~/inc/CatchThemesDemoImport.php file, in versions up to and including 1.7, due to insufficient file type validation. This makes it possible for an attacker with administrative privileges to upload malicious files that can be used to achieve remote code execution.
Max CVSS
7.2
EPSS Score
92.26%
Published
2021-10-21
Updated
2022-02-28
CVE-2021-39327
Public exploit
The BulletProof Security WordPress plugin is vulnerable to sensitive information disclosure due to a file path disclosure in the publicly accessible ~/db_backup_log.txt file which grants attackers the full path of the site, in addition to the path of database backup files. This affects versions up to, and including, 5.1.
Max CVSS
5.3
EPSS Score
18.35%
Published
2021-09-17
Updated
2022-10-25
CVE-2021-39144
Known exploited
Public exploit
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Max CVSS
8.5
EPSS Score
96.98%
Published
2021-08-23
Updated
2023-06-26
CISA KEV Added
2023-03-10
CVE-2021-38648
Known exploited
Public exploit
Open Management Infrastructure Elevation of Privilege Vulnerability
Max CVSS
7.8
EPSS Score
95.72%
Published
2021-09-15
Updated
2023-12-28
CISA KEV Added
2021-11-03
CVE-2021-38647
Known exploited
Public exploit
Used for ransomware
Open Management Infrastructure Remote Code Execution Vulnerability
Max CVSS
9.8
EPSS Score
97.46%
Published
2021-09-15
Updated
2023-12-28
CISA KEV Added
2021-11-03
CVE-2021-38294
Public exploit
A Command Injection vulnerability exists in the getTopologyHistory service of the Apache Storm 2.x prior to 2.2.1 and Apache Storm 1.x prior to 1.2.4. A specially crafted thrift request to the Nimbus server allows Remote Code Execution (RCE) prior to authentication.
Max CVSS
9.8
EPSS Score
81.25%
Published
2021-10-25
Updated
2022-10-18
CVE-2021-38085
Public exploit
The Canon TR150 print driver through 3.71.2.10 is vulnerable to a privilege escalation issue. During the add printer process, a local attacker can overwrite CNMurGE.dll and, if timed properly, the overwritten DLL will be loaded into a SYSTEM process resulting in escalation of privileges. This occurs because the driver drops a world-writable DLL into a CanonBJ %PROGRAMDATA% location that gets loaded by printisolationhost (a system process).
Max CVSS
7.8
EPSS Score
0.05%
Published
2021-08-11
Updated
2022-05-03
CVE-2021-37343
Public exploit
A path traversal vulnerability exists in Nagios XI below version 5.8.5 AutoDiscovery component and could lead to post authenticated RCE under security context of the user running Nagios.
Max CVSS
8.8
EPSS Score
48.46%
Published
2021-08-13
Updated
2022-02-22
CVE-2021-36942
Known exploited
Public exploit
Used for ransomware
Windows LSA Spoofing Vulnerability
Max CVSS
7.5
EPSS Score
85.29%
Published
2021-08-12
Updated
2023-12-28
CISA KEV Added
2021-11-03
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