Exploitation ongoing with high activity in latest observed window (2 mentions)
Recommended action window: Immediate (within 24h)
NVD description
A vulnerability was found in vBulletin 6.x. This impacts an unknown function of the component Login. Performing a manipulation results in cross site scripting. It is possible to initiate the attack remotely. The exploit has been made public and could be used. VulDB is withholding an extended redistribution of exploit details to prevent simplified exploitation. The vendor was contacted early about this disclosure but did not respond in any way.
Priority
LOW
Exploitation
ACTIVE
PoC
NONE
Patch
NONE
Momentum
NONE
Our CTI team identified a lot of activities targeting vBulletin (CVE-2026-9357) https://vuldb.com/vuln/365320/cti
Post summary
CTI team reports numerous observed activities targeting CVE-2026-9357 on vBulletin, suggesting active exploitation but providing no PoC, patch, or detailed technical information.
CVE-2026-9357 A vulnerability was found in vBulletin 6.x. This impacts an unknown function of the component Login. Performing a manipulation results in cross site scripting. It is po… https://www.cve.org/CVERecord?id=CVE-2026-9357
Post summary
A new XSS vulnerability, CVE-2026-9357, was discovered in vBulletin 6.x’s Login component; no PoC, exploit, or patch details are provided.