CVE-2026-90907

mediumpriority · track · 21EPSS 0.002 · 16 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.25% (16th) EPSS

CVSS 5.3 · medium

Is it mine?

8 products

Check your exposure

Who says so?

3 sources

cert_bund · nvd · osv

EPSS · scored 2026-10-27

Joomla! Core - [20260902] - Core - Unauthorized user account creation via profile.save controller in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The profile.save controller did not check the login state of a user, allowing the creation of guest-level users on sites without active user registration.

cvss

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

6.9

010

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

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v4.06.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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 · security@joomla.org

v4.05.5mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-639US

affected products (8)

Products and version ranges known to be affected.

Open Source Joomla Core <5.4.9all versionscert_bundDE
Open Source Joomla Core <6.1.4all versionscert_bundDE
Open Source Joomla≤ Core <5.4.9cert_bundDE
Open Source Joomla≤ Core <6.1.4cert_bundDE
joomla joomla!1.5.0 → 5.4.8nvdUScpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
joomla joomla!6.0.0 → 6.1.3nvdUScpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
Bitnami joomla1.5.0 → 5.4.8osvUSpkg:bitnami/joomla
Bitnami joomla6.0.0 → 6.1.3osvUSpkg:bitnami/joomla

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3636Joomla: Mehrere SchwachstellenDeutsch2026-09-29csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Joomla ausnutzen um Cross-Site-Scripting-Angriffe durchzuführen, Sicherheitsmaßnahmen zu umgehen, sensible Daten offenzulegen oder zu manipulieren und seine Berechtigungen zu erweitern.
BIT-joomla-2026-90907Joomla! Core - [20260902] - Core - Unauthorized user account creation via profile.save controller in Joomla 1.5.0-5.4.8, 6.0.0-6.1.32026-10-07vendor · osvUS
Joomla! Core - [20260902] - Core - Unauthorized user account creation via profile.save controller in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The profile.save controller did not check the login state of a user, allowing the creation of guest-level users on sites without active user registration.

sources

Which sources assert this record, and when.

cert_bund nvd osv NVD CVE.org MITRE

published 2026-09-29modified 2026-10-06

references (2) nvd

External citations — patches, advisories, analysis.

https://developer.joomla.org/security-centre/1082-20260902-core-unauthorized-user-account-creation-via-profile-save-controller.htmlPatchVendor Advisory
https://www.joomla.org/Product

scry

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