Vulnerability-Lookup

GHSA-43HG-F3WJ-J2M6

Vulnerability from github – Published: 2026-07-27 15:32 – Updated: 2026-07-27 15:32

Details

vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contains an eval injection vulnerability in the vB5_Template_Runtime::runMaths() method within the template runtime that allows unauthenticated remote attackers to execute arbitrary PHP code by supplying crafted input through the pagenav[pagenumber] parameter. Attackers can exploit the insufficiently restrictive regex filter by using phpfuck-style encoding with permitted characters to inject and execute arbitrary PHP code via the unauthenticated ajax/render template route without any authentication.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-61511"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-95"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-27T14:16:59Z",
    "severity": "CRITICAL"
  },
  "details": "vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contains an eval injection vulnerability in the vB5_Template_Runtime::runMaths() method within the template runtime that allows unauthenticated remote attackers to execute arbitrary PHP code by supplying crafted input through the pagenav[pagenumber] parameter. Attackers can exploit the insufficiently restrictive regex filter by using phpfuck-style encoding with permitted characters to inject and execute arbitrary PHP code via the unauthenticated ajax/render template route without any authentication.",
  "id": "GHSA-43hg-f3wj-j2m6",
  "modified": "2026-07-27T15:32:30Z",
  "published": "2026-07-27T15:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61511"
    },
    {
      "type": "WEB",
      "url": "https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509358-security-patch-released-for-vbulletin-6-2-1-6-2-0-and-6-1-6"
    },
    {
      "type": "WEB",
      "url": "https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509404-vbulletin-6-2-2-is-available"
    },
    {
      "type": "WEB",
      "url": "https://karmainsecurity.com/KIS-2026-13"
    },
    {
      "type": "WEB",
      "url": "https://ssd-disclosure.com/vbulletin-runtime-template-runmaths-preauth-rce"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/vbulletin-eval-injection-rce-via-vb5-template-runtime-php"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-61511 (GCVE-0-2026-61511)

Vulnerability from cvelistv5 – Published: 2026-07-27 12:39 – Updated: 2026-07-29 19:26

Title

vBulletin < 6.2.2 Eval Injection RCE via vb5/template/runtime.php

Summary

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-95 - Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

Assigner

VulnCheck

References

5 references

URL	Tags
https://karmainsecurity.com/KIS-2026-13	technical-descriptionexploit
https://ssd-disclosure.com/vbulletin-runtime-temp…	technical-descriptionexploit
https://forum.vbulletin.com/forum/vbulletin-annou…
https://forum.vbulletin.com/forum/vbulletin-annou…
https://www.vulncheck.com/advisories/vbulletin-ev…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
vBulletin	vBulletin	Affected: 5.0.0 , ≤ 5.7.5 (semver) Affected: 6.0.0 , ≤ 6.2.1 (semver) Unaffected: 6.2.2 (semver)

Date Public

2026-07-27 00:00

Credits

Egidio Romano

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-43HG-F3WJ-J2M6

CVE-2026-61511 (GCVE-0-2026-61511)

Tags

Sightings

Nomenclature