CVE-2021-26084
Atlassian Confluence Server and Data Center Object - [Actively Exploited]
Description
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.
INFO
Published Date :
Aug. 30, 2021, 7:15 a.m.
Last Modified :
Aug. 8, 2023, 2:21 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.
Apply updates per vendor instructions.
Public PoC/Exploit Available at Github
CVE-2021-26084 has a 133 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-26084
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-26084.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html | Exploit Third Party Advisory VDB Entry |
| https://jira.atlassian.com/browse/CONFSERVER-67940 | Issue Tracking Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Small & Fast Vulnerability Scanner Engine based on XRAY YAML Rule | 基于 XRAY YAML 规则的超轻量快速漏洞扫描引擎 | 可执行文件体积仅 2 MB
poc security vulnerability vulnerability-detection vulnerability-scanner web-security web-vulnerability-scanner
Batchfile Go ANTLR
A super simple Cisa KEV lookup CLI tool leveraging DuckDB
Python
红队武器库漏洞利用工具合集整理
HTML
confluence rce (CVE-2021-26084, CVE-2022-26134, CVE-2023-22527)
Python
Latest CVEs with their Proof of Concept exploits.
Python
None
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
WebTest Tools
blueteam cybersecurity exploit pentest pentesting redteam security-tools shell tools website
None
渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypass oa-getshell cve-cms
Assembly Python Shell PHP C++ C Go Ruby HTML Java
None
CSS HTML JavaScript
Confluence CVE 2021，2022，2023 利用工具，支持命令执行，哥斯拉，冰蝎 内存马注入
None
None
Python Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-26084 vulnerability anywhere in the article.
-
security.nl
VS publiceert overzicht van meest misbruikte kwetsbaarheden in 2023
De Amerikaanse autoriteiten hebben samen met cyberagentschappen uit Australië, Canada, Nieuw-Zeeland en het Verenigd Koninkrijk een overzicht van de meest misbruikte kwetsbaarheden in 2023 opgesteld. ... Read more
-
Darktrace
Confluence CVE-2022-26134 Zero-Day: Detection & Guidance
What is WarmCookie malware?WarmCookie, also known as BadSpace [2], is a two-stage backdoor tool that provides functionality for threat actors to retrieve victim information and launch additional paylo ... Read more
The following table lists the changes that have been made to the
CVE-2021-26084 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Aug. 08, 2023
Action Type Old Value New Value Changed CWE CWE-74 CWE-917 -
Modified Analysis by [email protected]
Jun. 10, 2022
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html No Types Assigned http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html Exploit, Third Party Advisory, VDB Entry Changed CPE Configuration OR *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23 *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11 *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6 *cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5 *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23 *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11 *cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6 *cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5 OR *cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23 *cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11 *cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6 *cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5 *cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23 *cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11 *cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6 *cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5 -
CVE Modified by [email protected]
Jun. 08, 2022
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html [No Types Assigned] -
CPE Deprecation Remap by [email protected]
Mar. 30, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5 OR *cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5 -
CPE Deprecation Remap by [email protected]
Mar. 30, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 from (excluding) 7.11.6 OR *cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 from (excluding) 7.11.6 -
Modified Analysis by [email protected]
Mar. 25, 2022
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 23, 2022
Action Type Old Value New Value Removed Reference http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html [Exploit, Third Party Advisory, VDB Entry] Removed Reference http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html [Exploit, Third Party Advisory, VDB Entry] -
CPE Deprecation Remap by [email protected]
Dec. 13, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5 OR *cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* versions from (including) 7.12.0 from (excluding) 7.12.5 -
Modified Analysis by [email protected]
Sep. 16, 2021
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html No Types Assigned http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html Exploit, Third Party Advisory, VDB Entry -
CVE Modified by [email protected]
Sep. 10, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/164122/Atlassian-Confluence-WebWork-OGNL-Injection.html [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 07, 2021
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html Exploit, Third Party Advisory http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry -
CVE Modified by [email protected]
Sep. 06, 2021
Action Type Old Value New Value Changed Description In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an authenticated user, and in some instances an unauthenticated user, to execute arbitrary code on a Confluence Server or Data Center instance. The vulnerable endpoints can be accessed by a non-administrator user or unauthenticated user if ‘Allow people to sign up to create their account’ is enabled. To check whether this is enabled go to COG > User Management > User Signup Options. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5. In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5. -
Initial Analysis by [email protected]
Sep. 02, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html Exploit, Third Party Advisory Changed Reference Type https://jira.atlassian.com/browse/CONFSERVER-67940 No Types Assigned https://jira.atlassian.com/browse/CONFSERVER-67940 Issue Tracking, Patch, Vendor Advisory Added CWE NIST CWE-74 Added CPE Configuration OR *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23 *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11 *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6 *cpe:2.3:a:atlassian:confluence:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5 *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions up to (excluding) 6.13.23 *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 6.14.0 up to (excluding) 7.4.11 *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.5.0 up to (excluding) 7.11.6 *cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 7.12.5 -
CVE Modified by [email protected]
Sep. 01, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/164013/Confluence-Server-7.12.4-OGNL-Injection-Remote-Code-Execution.html [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26084 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-26084
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
97.36 }} -0.05%
score
0.99923
percentile