TI-2023-10600 Aliases CVE-2023-25135 GHSA-r8jw-f89q-p7g6

vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary…

HIGH 82CWE-502Published 2023-02-03 · Updated 2025-03-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.

Summary

vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary code via a crafted HTTP request that triggers deserialization. This occurs because verify_serialized checks that a value is serialized by calling unserialize and then checking for errors. The fixed versions are 5.6.7 PL1, 5.6.8 PL1, and 5.6.9 PL1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.23926 97th 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: Yes
Technical impact: Total

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 · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:vbulletin:vbulletin:5.6.7:-::::::	5.6.7	Vulnerable	vBulletin
cpe:2.3:a:vbulletin:vbulletin:5.6.8:-::::::	5.6.8	Vulnerable	vBulletin
cpe:2.3:a:vbulletin:vbulletin:5.6.9:-::::::	5.6.9	Vulnerable	vBulletin

cpe:2.3:a:vbulletin:vbulletin:5.6.7:-:*:*:*:*:*:* Versions 5.6.7 Vulnerable ·vBulletin
cpe:2.3:a:vbulletin:vbulletin:5.6.8:-:*:*:*:*:*:* Versions 5.6.8 Vulnerable ·vBulletin
cpe:2.3:a:vbulletin:vbulletin:5.6.9:-:*:*:*:*:*:* Versions 5.6.9 Vulnerable ·vBulletin

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-25135
2026-10-03 Alias added: GHSA-r8jw-f89q-p7g6

References

Exploit 1

https://www.ambionics.io/blog/vbulletin-unserializable-but-unreachable

Advisory 1

https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4473890-vbulletin-5-6-9-security-patch

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-2016-05317 SQL injection vulnerability in forumrunner/includes/moderation.php in vBulletin before… CVSS 3.0CRITICAL 9.8
TI-2025-31015 Certain vBulletin versions might allow attackers to execute arbitrary PHP code by abusing… CVSS 3.1CRITICAL 9.0

See all 49 →

Sources

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