Security readout for executives and security teams
Plain-English summary
CVE-2026-48906 is a critical arbitrary file deletion flaw in the Tassos Framework plugin for Joomla. An unauthenticated remote attacker may be able to delete files on affected sites, potentially disrupting availability or damaging site integrity. Prioritize Joomla sites using Tassos products, especially public-facing sites.
Executive priority
Treat this as urgent for public Joomla sites using Tassos extensions. The business risk is site disruption or content damage from remote unauthenticated file deletion. Prioritize asset discovery, version validation, and vendor-guided updates.
Technical view
The CVE describes improper access control (CWE-284) in Novarain/Tassos Framework plg_system_nrframework versions 1.0.0 through 6.0.1. CVSS 4.0 is 9.3, with network attack vector, low complexity, no privileges, and no user interaction. Several Tassos Joomla extensions are listed with affected version ranges because they may include or depend on the framework.
Likely exposure
Exposure is likely limited to Joomla installations using affected Tassos Framework versions or listed Tassos extensions: Convert Forms, EngageBox, Google Structured Data, Advanced Custom Fields, Smile Pack, Tassos Code Snippets, and MailChimp Auto-Subscribe.
Exploitation context
The provided sources do not report active exploitation, and this CVE is not marked as CISA KEV. However, the CVSS vector indicates remote unauthenticated exploitation with low complexity and no user interaction, making exposed affected sites high priority for validation.
Researcher notes
The source bundle provides affected version ranges and CVSS details but limited remediation detail. Do not assume exploitation in the wild from the available evidence. Validate whether affected extensions bundle vulnerable framework code or require a separate framework update.
Mitigation direction
- Inventory Joomla sites for Tassos Framework and listed Tassos extensions.
- Update affected components outside the listed vulnerable version ranges.
- For the framework plugin, move beyond versions 1.0.0 through 6.0.1.
- Check Tassos vendor guidance for exact fixed versions and upgrade sequencing.
- Back up sites before updating extensions in production.
- Restrict administrative access and monitor file integrity until updates are confirmed.
Validation and detection
- Confirm installed version of plg_system_nrframework on each Joomla site.
- Check listed Tassos extension versions against CVE affected ranges.
- Verify updates place components outside affected version ranges.
- Review recent file deletion or unexpected missing file events.
- Confirm no affected Tassos components remain enabled after remediation.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 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-2026-48906 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
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/AU:Y
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:N/VI:H/VA:H/SC:N/SI:H/SA:H/AU:Y——JoomlaVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/AU:Y
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://tassos.gr/CVE reference, Joomla · product
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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.