Security readout for executives and security teams
Plain-English summary
This CVE affects a Joomla event-registration component. A public-facing vulnerable site could let an unauthenticated attacker query the database and access sensitive information. The sources identify version 4.1.3 specifically; they do not name a patched version.
Executive priority
Prioritize within the current vulnerability cycle for any public Joomla site using this component. Escalate faster if logs show suspicious probing or the site stores customer, payment, or attendee data.
Technical view
CVE-2017-20273 is CWE-89 SQL injection in Joomlashowroom Event Registration Pro Calendar 4.1.3. The vulnerable input is the id parameter in the Joomla com_registrationpro category view. The CVSS 4.0 score is 8.8, with network attack, low complexity, no privileges, and no user interaction.
Likely exposure
Likely exposure is internet-facing Joomla sites running Event Registration Pro Calendar 4.1.3. Organizations not using this component, or using a different version, are not confirmed affected by the provided sources.
Exploitation context
A public ExploitDB reference exists, but the bundle does not show confirmed active exploitation. CISA KEV status is false, so treat this as publicly documented and exploitable, not proven actively exploited.
Researcher notes
The record is recently published and updated in June 2026, but references an older component version. Sources support unauthenticated SQL injection and public exploit availability, but not active exploitation or a specific fixed release.
Mitigation direction
- Inventory Joomla sites for Event Registration Pro Calendar 4.1.3.
- Remove or disable the component if it is not business-critical.
- Check Joomlashowroom or trusted advisories for patch or upgrade guidance.
- Restrict public access to affected event registration pages where feasible.
- Review database account privileges used by Joomla for least privilege.
Validation and detection
- Confirm whether Joomla has com_registrationpro installed.
- Record the installed Event Registration Pro Calendar version.
- Review web logs for suspicious requests to the category view id parameter.
- Check database and application logs for unusual query errors or data access.
- Verify backups and incident response contacts before 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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-20273 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
- High
- CVSS
- 8.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
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
2 official scoresWe 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:L/VA:N/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N3.94.2VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.8HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
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
- ExploitDB-42416CVE reference, VulnCheck · exploit
- VulnCheck Advisory: Joomla Event Registration Pro Calendar 4.1.3 SQL InjectionCVE reference, VulnCheck · 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.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.