Security readout for executives and security teams
Plain-English summary
DJ-Classifieds versions 1.0 through 3.11.1 allow an unauthenticated remote attacker to upload arbitrary files. The published description states this can lead to complete remote code execution, potentially exposing website data, administrative control, and hosted services without credentials or user interaction.
Executive priority
Treat this as an immediate remediation priority for internet-facing systems. Assign ownership today, identify affected installations, upgrade promptly, and investigate possible compromise because exploitation could provide complete control without authentication.
Technical view
CVE-2026-61424 is a CWE-434 unrestricted file-upload vulnerability in the DJ-Classifieds Joomla extension. Its CVSS 4.0 score is 10.0, reflecting network accessibility, low complexity, no authentication, no user interaction, and high impact across confidentiality, integrity, and availability.
Likely exposure
Internet-accessible Joomla sites running DJ-Classifieds versions 1.0 through 3.11.1 are the identified exposure. The supplied sources do not establish whether vulnerable functionality must be separately enabled or identify additional affected products.
Exploitation context
The sources describe unauthenticated file upload leading to full remote code execution. CVE-2026-61424 is not listed as KEV in the supplied bundle, and no cited evidence confirms active exploitation. Public technical details may nevertheless increase near-term risk.
Researcher notes
The affected range and RCE outcome are stated, but the supplied evidence does not clarify vulnerable endpoints, configuration prerequisites, exploitation telemetry, or whether uploaded files execute under every hosting configuration. Avoid inferring active exploitation from severity alone.
Mitigation direction
- Inventory Joomla sites and identify every installed DJ-Classifieds version.
- Upgrade affected installations to version 3.11.2 or later after checking vendor guidance.
- Restrict public access to affected sites until upgrading if immediate remediation is impossible.
- Review vendor and hosting-provider guidance for additional containment or cleanup requirements.
Validation and detection
- Confirm DJ-Classifieds is absent or reports version 3.11.2 or later.
- Verify all production, staging, backup, and forgotten Joomla instances are included.
- Review upload locations and server logs for unexpected files or suspicious unauthenticated requests.
- Check website integrity and investigate unexplained administrative, content, or hosting changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-61424 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H——JoomlaVulnerability scoring details
Base CVSS 4.0 score
10CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://dj-extensions.com/dj-classifiedsCVE reference, Joomla · product
- https://mysites.guru/blog/dj-classifieds-unauthenticated-file-upload/CVE reference, Joomla · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.