Background exploitation KEV catalog No authentication

CVE-2021-26086

Atlassian Jira Server and Data Center Path Traversal Vulnerability

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to read particular files via a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The affected versions are before version 8.5.14, from version…

CheckOps priority index

7.5/10 Patch within 7 days

Severity5.3

Probability10.0

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 100.00% higher than 99.99% of CVEs

CVSS 3.1 5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:

Exploited for 721 days 12 Nov 2024

CISA due date 03 Dec 2024 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)12 Nov 2024
Exploited in EUVD (ENISA)12 Nov 2024
Used by ransomwareno
EPSS above 10 %100.00%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Affected products

Jira ServerJira Data CenterJira Server and Data Center

Affected versions

8.6.0 <unspecified
8.14.0 <unspecified
unspecified <8.13.6
unspecified <8.5.14
unspecified <8.16.1

Weaknesses (CWE)

CWE-22

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

16 Aug 2021
Published
12 Nov 2024
Exploitation reported (ENISA)
12 Nov 2024
Added to the KEV catalog
03 Dec 2024
CISA remediation due date
26 Sept 2026
EPSS peak: 100.00%

References

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