CVE-2025-27753 is a SQL Injection (SQLi) vulnerability identified in the RSMediaGallery component versions 1.7.4 through 2.1.6 for Joomla, a widely used content management system (CMS). The vulnerability arises from improper neutralization of special elements in SQL commands (CWE-89), specifically due to unescaped user-supplied parameters being directly incorporated into SQL queries within the dashboard component of RSMediaGallery. This flaw allows an authenticated attacker to inject malicious SQL code via unsanitized input fields. Exploitation can lead to unauthorized access to the underlying database, enabling attackers to read sensitive data, modify records, or potentially escalate privileges within the Joomla environment. The CVSS v3.1 base score is 6.5 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and impacts on confidentiality and integrity (C:L/I:L), but no impact on availability (A:N). Although no public exploits are currently known, the vulnerability's presence in a popular Joomla component and the lack of patches at the time of publication increase the risk of future exploitation. The vulnerability specifically affects the dashboard component, which is typically accessible to authenticated users, but the CVSS vector indicates no privileges required, suggesting that the flaw might be exploitable without authentication, or that the component is exposed in a way that does not require elevated permissions. This discrepancy should be carefully verified by administrators. Overall, this SQLi vulnerability poses a significant risk to the confidentiality and integrity of data managed by Joomla sites using the affected RSMediaGallery versions.

For European organizations using Joomla with the RSMediaGallery component versions 1.7.4 to 2.1.6, this vulnerability could lead to unauthorized database access, resulting in data leakage of sensitive information such as user data, media metadata, or configuration details. The integrity of website content and stored data could be compromised, allowing attackers to modify or delete records, potentially disrupting business operations or damaging reputation. Given Joomla's popularity among European small and medium enterprises, cultural institutions, and government websites, exploitation could affect a broad range of sectors including public administration, education, and media. The vulnerability's potential to be exploited remotely without user interaction increases the risk of automated attacks or targeted intrusions. Although availability is not directly impacted, the indirect consequences of data breaches or content tampering could lead to service disruptions or compliance violations under GDPR, resulting in legal and financial penalties. The absence of known exploits currently provides a window for mitigation, but organizations should act promptly to prevent future attacks.

European organizations should immediately audit their Joomla installations to identify the presence of the RSMediaGallery component and verify the version in use. If affected versions (1.7.4 to 2.1.6) are detected, organizations should seek updates or patches from the vendor rsjoomla.com; if no official patch is available, consider disabling or removing the component until a fix is released. Implement strict input validation and sanitization on all user-supplied data, especially within the dashboard component, to prevent SQL injection. Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting Joomla components. Restrict access to the Joomla dashboard and RSMediaGallery interfaces using network segmentation, IP whitelisting, or multi-factor authentication to reduce exposure. Regularly monitor logs for suspicious database queries or unusual user activity indicative of exploitation attempts. Additionally, conduct security assessments and penetration testing focused on Joomla components to identify and remediate similar vulnerabilities proactively. Finally, maintain an incident response plan tailored to web application compromises to ensure rapid containment if exploitation occurs.