CVE-2026-102783
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
Path Traversal vulnerability in Joomla extension Gridbox (before 2.20.4.0) in the showImage action allows reading files from sibling directories if image decoding fails, due to insufficient containment checks.
Risk Assessment
Limited file disclosure, potentially exposing images outside the intended root, which may lead to leakage of sensitive graphic data.
Recommendation
Update Gridbox to version 2.20.4.0 or later.
Other vulnerabilities in Gridbox
See all- CVE-2026-65888Critical
The Joomla extension Gridbox before version 2.20.2 has an account takeover vulnerability. The socialLogin method allows an attacker to log in as any user on the target site.
- CVE-2026-65887Critical
Joomla Extension Gridbox below version 2.20.2 has a vulnerability allowing an unauthenticated attacker to reset any user's password (excluding super admins). This allows logging in and acting as those users.
- CVE-2026-65890Critical
Joomla Extension Gridbox below version 2.20.2 has multiple SQL injection vectors allowing an unauthenticated attacker to inject SQL queries.
- CVE-2026-65884Critical
Joomla Extension Gridbox below version 2.20.2 has a privilege escalation vulnerability. The registration method allows users to provide usergroup IDs, enabling an unauthenticated attacker to register an account with administrative permissions.
- CVE-2026-61425Critical
The Joomla extension Gridbox versions below 1.6.0 contains an authentication bypass vulnerability. An attacker can gain full administrative access without providing valid credentials.
- CVE-2026-102784High
The Joomla extension Gridbox (by balbooa.com) below version 2.20.4.0 contains a CSRF vulnerability in the language installation feature because the addLanguage action does not require POST and does not validate the session token.
- CVE-2026-65947High
Joomla Extension Gridbox from balbooa.com versions < 2.20.2 has various CSRF vectors in the admin interface.
- CVE-2026-65886High
Joomla Extension Gridbox below version 2.20.2 has a vulnerability allowing an unauthenticated attacker to read arbitrary files via the photo viewer.
- CVE-2026-66490Medium
Joomla Extension - balbooa.com - contains a stored cross-site scripting vulnerability via a comment avatar in Gridbox before version 2.20.2.
- CVE-2026-66489Medium
Joomla Extension Gridbox from balbooa.com versions < 2.20.2 has various unauthenticated file system disclosure vectors.
Original NVD description (English source)
Joomla Extension - balbooa.com - Path Traversal in image preview Gridbox < 2.20.4.0 - Gridbox contains the same prefix-only containment logic in its site UploaderHelper . The showImage action resolves a request-controlled path, calls that helper, and then returns the image. If image decoding is unavailable or fails, the action streams the file directly. An existing image in a sibling directory such as images-backup can therefore satisfy the current containment test even though it is outside the configured images root. The route restricts the file extension to Gridbox image types, which materially limits the read primitive. The default media root is images ; the effective site setting was not independently verified. No prefix-matching sibling directory was found alongside the site’s images directory. The finding is rated Low rather than presented as arbitrary file disclosure.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS