CVE-2021-26084Critical KEVConfirmedExploit available
CVE
CVE
National Vulnerability Database
NVD is the U.S. government repository of standards-based vulnerability management data, built on top of the MITRE CVE list. Every record includes CPE applicability statements, CVSS v2 and v3.x base scores, CWE mappings and cross-references to advisories.
Region
US
Updates
15 min
License
Public Domain
Comprehensive catalog of publicly disclosed vulnerabilities with CPE matches, CVSS scoring and reference URLs. De-facto standard for cross-vendor correlation.
https://nvd.nist.gov →Share link
Anyone with the link can open this vulnerability.
In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attac…
CVSS
9.8
Critical
EPSS
0.94
p99
Published
2021-01-01
Updated
2021-11-03
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.
Tags · CWE
KEVPre-auth
CWE-917
CWE-917BaseIncomplete
Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.
https://cwe.mitre.org/data/definitions/917.html →Open in CWE collection →Affected products
Confluence_data_center < 6.13.23Confluence_data_center 6.14.0–7.4.11Confluence_data_center 7.5.0–7.11.6Confluence_data_center 7.12.0–7.12.5Confluence_server < 6.13.23Confluence_server 6.14.0–7.4.11Confluence_server 7.5.0–7.11.6Confluence_server 7.12.0–7.12.5
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Timeline
2021-01-01
Published
2021-11-03
Added to KEV
2021-11-03
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.944 · p99
Known exploited (KEV)
Yes
Known exploits — Сканер-ВС
CVE-2021-26084
cisa · https://www.cisa.gov/known-exploited-vulnerabilities-catalog
50243
exploitdb · https://www.exploit-db.com/exploits/50243
Affected software
| Product | Vendor | Status |
|---|---|---|
| confluence_data_center | * | Exploited |
| confluence_server | * | Exploited |
Source databases
CVE
CVE
National Vulnerability Database
NVD is the U.S. government repository of standards-based vulnerability management data, built on top of the MITRE CVE list. Every record includes CPE applicability statements, CVSS v2 and v3.x base scores, CWE mappings and cross-references to advisories.
Region
US
Updates
15 min
License
Public Domain
Comprehensive catalog of publicly disclosed vulnerabilities with CPE matches, CVSS scoring and reference URLs. De-facto standard for cross-vendor correlation.
https://nvd.nist.gov →Related vulnerabilities