Freshrss

self-hostable RSS aggregator. versions up to 1.28.0 is affected by improper access control (CVSS 7.5).

FreshRSS is a free, self-hostable RSS aggregator. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated medium severity (CVSS 6.7), this vulnerability is remotely exploitable. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated medium severity (CVSS 6.7), this vulnerability is remotely exploitable. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

FreshRSS is a free, self-hostable RSS aggregator. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Critical authentication bypass vulnerability in FreshRSS versions prior to 1.26.2 that allows authenticated attackers to impersonate any user, including administrators, by exploiting improper HTTP authentication header validation in reverse proxy configurations. Attackers with a valid account can craft requests leveraging CSRF token extraction via XPath scraping and spoofed Remote-User or X-WebAuth-User headers to gain unauthorized access and privilege escalate. The vulnerability requires moderate attack complexity (knowledge of target IP and admin username) but has high real-world impact due to the authentication bypass and privilege escalation chain.

A security vulnerability in FreshRSS (CVSS 4.3). Risk factors: public PoC available. Vendor patch is available.

FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, HTML is sanitized improperly inside the `<iframe srcdoc>` attribute, which leads to cross-site scripting (XSS) by loading an attacker's UserJS inside `<script src>`. In order to execute the attack, the attacker needs to control one of the victim's feeds and have an account on the FreshRSS instance that the victim is using. An attacker can gain access to the victim's account by exploiting this vulnerability. If the victim is an admin it would be possible to delete all users (cause damage) or execute arbitrary code on the server by modifying the update URL using fetch() via the XSS. Version 1.26.2 contains a patch for the issue.

FreshRSS is a self-hosted RSS feed aggregator. A vulnerability in versions prior to 1.26.2 causes a user to be repeatedly logged out after fetching a malicious feed entry, effectively causing that user to suffer denial of service. Version 1.26.2 contains a patch for the issue.

FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, it's possible to run arbitrary JavaScript on the feeds page. This occurs by combining a cross-site scripting (XSS) issue that occurs in `f.php` when SVG favicons are downloaded from an attacker-controlled feed containing `<script>` tags inside of them that aren't sanitized, with the lack of CSP in `f.php` by embedding the malicious favicon in an iframe (that has `sandbox="allow-scripts allow-same-origin"` set as its attribute). An attacker needs to control one of the feeds that the victim is subscribed to, and also must have an account on the FreshRSS instance. Other than that, the iframe payload can be embedded as one of two options. The first payload requires user interaction (the user clicking on the malicious feed entry) with default user configuration, and the second payload fires instantly right after the user adds the feed or logs into the account while the feed entry is still visible. This is because of lazy image loading functionality, which the second payload bypasses. An attacker can gain access to the victim's account by exploiting this vulnerability. If the victim is an admin it would be possible to delete all users (cause damage) or execute arbitrary code on the server by modifying the update URL using fetch() via the XSS. Version 1.26.2 has a patch for the issue.

FreshRSS versions prior to 1.26.2 suffer from an information disclosure vulnerability that allows unauthenticated remote attackers to enumerate server directories and infer installed software versions (such as PHP versions) without requiring privileges or user interaction. This information leakage can be weaponized for reconnaissance to identify additional attack surfaces. The vulnerability has a CVSS 3.1 score of 7.5 (High) with a network attack vector and no complexity barriers, making it trivially exploitable at scale.