Improper access control in Apache Tapestry - CVE-2021-27850

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Main Vulnerability Database Vulnerabilities #VU52713

Improper access control in Apache Tapestry - CVE-2021-27850

Published: April 28, 2021 / Updated: September 14, 2021


Vulnerability identifier: #VU52713
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green
CVE-ID: CVE-2021-27850
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vendor: Apache Foundation
Affected software:
Apache Tapestry

Detailed vulnerability description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote attacker can bypass implemented security restrictions and download the "AppModule.class" file and obtain the HMAC secret key.


How to mitigate CVE-2021-27850

Install updates from vendor's website.

Sources