CVE-2026-61511

criticalpriority · track · 12EPSS 0.056 · 93 %ileexploit · PoCDEEU

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

5 exploits · PoC

Likely / severe?

5.61% (93rd) EPSS

CVSS 9.8 · critical

Is it mine?

11 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · disclosure@vulncheck.comexploitability 3.9 · impact 5.9

v4.09.3criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.09.3criticalCVSS: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:Xsecondary · disclosure@vulncheck.com

v4.09.3criticalCVSS: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:A/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-95US

exploits (5)

Public proof-of-concept and weaponised exploit code.

affected products (11)

Products and version ranges known to be affected.

vBulletin vBulletin <6.1.6 Patch Level 1all versionscert_bundDE
vBulletin vBulletin <6.2.0 Patch Level 1all versionscert_bundDE
vBulletin vBulletin <6.2.1 Patch Level 1all versionscert_bundDE
vBulletin vBulletin <6.2.2all versionscert_bundDE
vBulletin vBulletin< 6.1.6 Patch Level 1cert_bundDE
vBulletin vBulletin< 6.2.0 Patch Level 1cert_bundDE
vBulletin vBulletin< 6.2.1 Patch Level 1cert_bundDE
vBulletin vBulletin< 6.2.2cert_bundDE
vBulletin vBulletin≤ 5.0.0 ≤5.7.5enisa_euvdEU
vBulletin vBulletin≤ 6.0.0 ≤6.2.1enisa_euvdEU
vBulletin vBulletin< 6.2.2enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2528vBulletin: Schwachstelle ermöglicht CodeausführungDeutsch2026-07-26csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in vBulletin ausnutzen, um beliebigen Programmcode auszuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-07-27modified 2026-08-07

references (16)

External citations — patches, advisories, analysis.

scry

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