Security readout for executives and security teams
Plain-English summary
CVE-2018-9107 is a CSV formula injection issue in Acyba AcyMailing for Joomla before 5.9.6. Malicious content could be mishandled during CSV export and become dangerous when someone opens the file in a spreadsheet application. The main business risk is compromise through administrative export workflows, not direct server takeover from the source evidence.
Executive priority
Prioritize remediation where AcyMailing exports are used by administrators handling sensitive customer or subscriber data. This is not evidenced as actively exploited in the provided sources, but it creates a realistic phishing-style workflow risk through trusted administrative file handling.
Technical view
The vulnerability affects AcyMailing’s export feature before version 5.9.6. User-controlled values were not safely handled in CSV output, allowing formula injection when the exported CSV is processed by spreadsheet software. The provided sources do not include CVSS scoring, CWE mapping, or detailed affected CPE data.
Likely exposure
Exposure is most likely on Joomla sites running AcyMailing before 5.9.6 where administrators or staff export subscriber or contact data to CSV and open those files in spreadsheet tools.
Exploitation context
A public Exploit-DB reference exists, but the source bundle does not show CISA KEV listing or confirmed active exploitation. Successful impact likely depends on malicious data entering exported fields and a trusted user opening the exported CSV in a spreadsheet application.
Researcher notes
Evidence is limited to the CVE description and referenced advisories. The affected range is stated as before 5.9.6, but the bundle does not provide CVSS, CWE, exact vulnerable fields, or confirmed in-the-wild exploitation. Avoid assuming server-side code execution without additional vendor evidence.
Mitigation direction
- Upgrade AcyMailing to version 5.9.6 or later.
- Review Acyba and Joomla VEL guidance for the vendor-confirmed fix.
- Restrict CSV export permissions to trusted administrative users.
- Treat exported CSV files as untrusted before opening in spreadsheet software.
- Review spreadsheet security settings for automatic formula execution behavior.
Validation and detection
- Inventory Joomla sites using the AcyMailing extension.
- Confirm installed AcyMailing versions are 5.9.6 or newer.
- Identify users or roles allowed to run CSV exports.
- Review recent export activity where logs are available.
- Confirm operational guidance covers safe handling of exported CSV files.
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.
CVE-2018-9107 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.acyba.com/acymailing/change-log.htmlCVE reference · x_refsource_MISC
- 44369CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://vel.joomla.org/resolved/2136-acymailing-5-9-5-csv-injectionCVE reference · x_refsource_MISC
- https://vel.joomla.org/articles/2140-introducing-csv-injectionCVE reference · x_refsource_MISC
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.