WeGIA vulnerable to Cross-Site Scripting (XSS) Reflected via endpoint 'index.php' parameter 'erro'

published 2025-07-14 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-21391

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

WeGIA is an open source web manager with a focus on the Portuguese language and charitable institutions. A Reflected Cross-Site Scripting (XSS) vulnerability was identified in the `index.php` endpoint of the WeGIA application prior to version 3.4.5. This vulnerability allows attackers to inject malicious scripts in the `erro` parameter. Version 3.4.5 contains a patch for the issue.

Patch / fix

fixed in 1

wegia wegia 3.4.5

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 15 mo ago (2025-07-15)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/LabRedesCefetRJ/WeGIA/security/advisories/GHSA-9rrm-92jv-xwcv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

LabRedesCefetRJ WeGIA

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /LabRedesCefetRJ/WeGIA/security/advisories/GHSA-9rrm-92jv-xwcv
exploit, vendor-advisory

Sources

CVE List CVE-2025-53820
NVD CVE-2025-53820

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary