PatchSiren

vBulletin CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

LOW vBulletin CVE published 2026-05-24

CVE-2026-9357

A cross-site scripting (XSS) vulnerability exists in vBulletin 6.x within the Login component. The vulnerability allows remote attackers to perform manipulation resulting in XSS. The exploit has been made public, though VulDB is withholding extended redistribution of exploit details to prevent simplified exploitation. The vendor was contacted early about this disclosure but did not respond. The vulnerabil [truncated]

Known exploited vBulletin CVE published 2021-11-03

CVE-2020-17496

CVE-2020-17496 is a vBulletin PHP module remote code execution vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2021-11-03. That KEV listing means the issue is treated as known exploited and should be prioritized for remediation using vendor guidance. The available source material does not include a CVSS score or version scope, so defenders should rely on the official CVE, N [truncated]

Known exploited vBulletin CVE published 2021-11-03

CVE-2019-16759

CVE-2019-16759 is a vBulletin PHP module remote code execution vulnerability that CISA listed in its Known Exploited Vulnerabilities catalog on 2021-11-03. For defenders, the key takeaway is that this issue is confirmed as known exploited, so patching should be treated as urgent and handled according to the vendor’s update guidance.