vBulletin through 5.5.4 mishandles custom avatars.

published 2019-10-04 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-7590

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 11.8%; EPSS 11.8% chance of exploitation in 30 days, percentile 96%
public exploits: 1; Exploit-DB

Timeline

2019-10-04 Published
2019-10-07 First public exploit (EDB-47475)

Exploit prediction

11.83% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-47475 vBulletin 5.0 < 5.5.4 - 'updateAvatar' Authenticated Remote Code Execution webapps, 2019-10-07

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	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-20 Improper Input Validation
CWE-94 Improper Control of Generation of Code

References

forum.vbulletin.com /forum/vbulletin-announcements/vbulletin-announcements_aa/4423646-vbulletin-5-5-x-5-5-2-5-5-3-and-5-5-4-securi
vendor-advisory
seclists.org /fulldisclosure/2019/Oct/9
mailing-list, third-party-advisory
packetstormsecurity.com /files/154759/vBulletin-5.5.4-Remote-Code-Execution.html
third-party-advisory

Sources

CVE List CVE-2019-17132
NVD CVE-2019-17132

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.

Summary