XSS in Labredescefetrj Wegia
CVE-2026-33135
WeGIA is a web manager for charitable institutions. Versions 3.6.6 and below have a Reflected Cross-Site Scripting (XSS) vulnerability in the novo_memorandoo.php endpoint. An attacker can inject arbitrary JavaScript into the sccs GET parameter, which is directly echoed into the HTML response without any sanitization or encoding. The script /html/memorando/novo_memorandoo.php reads HTTP GET parameters to display dynamic success messages to the user. At approximately line 273, the code checks if $_GET['msg'] equals 'success'. If true, it directly concatenates $_GET['sccs'] into an HTML alert <div> and outputs it to the browser. This issue has been fixed in version 3.6.7.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Labredescefetrj Wegia — versions < 3.6.7
- Wegia
Weakness classification (CWE)
References
- github.com/LabRedesCefetRJ/WeGIA/security/advisories/GHSA-w5rv-5884-w94v (Exploit, Vendor Advisory)
- github.com/LabRedesCefetRJ/WeGIA/pull/1459 (Patch, Issue Tracking)
- github.com/LabRedesCefetRJ/WeGIA/releases/tag/3.6.7 (Release Notes)
Frequently asked questions
- What is CVE-2026-33135?
- CVE-2026-33135 is a critical-severity vulnerability in Labredescefetrj Wegia, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-03-20.
- How severe is CVE-2026-33135?
- Critical severity. CVSS v3 base score is 9.3 out of 10.