CVE-2020-25788: 
Linux Debian vulnerability analysis and mitigation

An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16, affecting the imgproxy functionality in plugins/af_proxy_http/init.php. The vulnerability involves improper handling of $_REQUEST["url"] parameter in error messages (CVE Details).

The vulnerability has been assigned a CVSS v3.1 Base Score of 8.1 (HIGH) with the vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. The weakness is categorized as CWE-829 (Inclusion of Functionality from Untrusted Control Sphere). The vulnerability affects all versions of Tiny Tiny RSS prior to the September 16, 2020 release (NVD).

The vulnerability could potentially lead to high impacts on confidentiality, integrity, and availability of the affected system. With a CVSS base score of 8.1, it represents a significant security risk that could allow attackers to compromise system security through the mishandling of URL parameters (NVD).

The vulnerability requires network access (AV:N) with high attack complexity (AC:H). No privileges (PR:N) or user interaction (UI:N) are required to exploit this vulnerability. The scope is unchanged (S:U), indicating the impact is limited to the vulnerable component (NVD).

The vulnerability was fixed in the September 16, 2020 release of Tiny Tiny RSS. Users are advised to update to the latest version. The fix was implemented through a patch that addresses the URL parameter handling issue (Vendor Advisory, Patch).

The vulnerability was responsibly disclosed by Daniel Neagaru and other employees of DigeeX. The vendor acknowledged the quality of the vulnerability report and praised the clear and concise methodology provided by the security researchers (Vendor Advisory).