slub_events for Typo3 Arbitrary File Upload

published 2019-10-16 7y ago modified 2026-06-17 4mo ago also GHSA-5pww-3mfc-g8vr , EUVD-2022-2635

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits: 0; none known

The slub_events (aka SLUB: Event Registration) extension through 3.0.2 for TYPO3 allows uploading of arbitrary files to the webserver. For versions 1.2.2 and below, this results in Remote Code Execution. In versions later than 1.2.2, this can result in Denial of Service, since the web space can be filled up with arbitrary files.

Patch / fix

fixed in 1

packagist slub/slub-events 3.0.3

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Exploit prediction

2.53% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	slub/slub-events	<3.0.3	3.0.3

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

extensions.typo3.org /extension/slub_events
web, third-party-advisory
typo3.org /security/advisory/typo3-ext-sa-2019-017/
third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2019-16700
advisory
typo3.org /security/advisory/typo3-ext-sa-2019-017
web

Sources

Fencer Intel 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.