TI-2023-20779 Aliases CVE-2023-39777 GHSA-8mfq-mqv3-25m4

A cross-site scripting (XSS) vulnerability in the Admin Control Panel of vBulletin 5.7.5…

MEDIUM 58CWE-79Published 2023-09-16 · Updated 2024-09-25

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

A cross-site scripting (XSS) vulnerability in the Admin Control Panel of vBulletin 5.7.5 and 6.0.0 allows attackers to execute arbitrary web scripts or HTML via the /login.php?do=login url parameter.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00446 39th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:vbulletin:vbulletin::::::::	up to 6.0.0	Vulnerable	vBulletin

cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:* Versions up to 6.0.0 Vulnerable ·vBulletin

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-39777
2026-10-03 Alias added: GHSA-8mfq-mqv3-25m4

References

Exploit 1

https://gist.github.com/GiongfNef/8fe658dce4c7fcf3a7b4e6387e50141c

TI-2020-13248 vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data… KEVCVSS 3.1CRITICAL 9.8
TI-2019-12540 vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code]… KEVCVSS 3.1CRITICAL 9.8
TI-2025-31014 vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to… CVSS 3.1CRITICAL 10.0
TI-2020-10114 vBulletin before 5.5.6pl1, 5.6.0 before 5.6.0pl1, and 5.6.1 before 5.6.1pl1 has incorrect access control. CVSS 3.1CRITICAL 9.8
TI-2023-10600 vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary… CVSS 3.1CRITICAL 9.8
TI-2016-05317 SQL injection vulnerability in forumrunner/includes/moderation.php in vBulletin before… CVSS 3.0CRITICAL 9.8

See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences