Greenbone Security Assistant (GSA) before 8.0.2 and Greenbone OS (GOS) before 5.0.10 allow XSS during 404 URL handling in gsad.

published 2021-06-21 5y ago modified 2026-06-17 4mo ago also EUVD-2019-11497

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

Patch / fix

fixed in 2 links 2

greenbone greenbone_security_assistant 8.0.2
greenbone greenbone_os 5.0.10

github.com/greenbone/gsa#1603 pull request
github.com/greenbone/gsa/issues/1601 advisory

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Exploit prediction

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/greenbone/gsa/issues/1601 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /greenbone/gsa/pull/1603
patch, third-party-advisory
github.com /greenbone/gsa/issues/1601
exploit, patch, third-party-advisory
github.com /greenbone/gsa/blob/master/CHANGELOG.md#802---2020-05-13
release-notes, third-party-advisory

Sources

CVE List CVE-2019-25047
NVD CVE-2019-25047

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