Monstra CMS 1.6 allows XSS via an uploaded SVG document to the admin/index.php?id=filesmanager&path=uploads/ URI.

published 2020-03-02 6y ago modified 2026-06-17 4mo ago also EUVD-2018-11288

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

Monstra CMS 1.6 allows XSS via an uploaded SVG document to the admin/index.php?id=filesmanager&path=uploads/ URI. NOTE: this is a discontinued product.

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Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/security-provensec/CVE-2018-19599/blob/master/monstra-dev_svg.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /security-provensec/CVE-2018-19599/blob/master/monstra-dev_svg.pdf
exploit, third-party-advisory
github.com /monstra-cms/monstra/issues/467
anh.im /image/lG1

Sources

CVE List CVE-2018-19599
NVD CVE-2018-19599

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