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PatchSiren cyber security CVE debrief

CVE-2026-102790 iCagenda CVE debrief

A stored XSS vulnerability exists in the iCagenda Joomla extension from version 3.2.1 to 4.0.16 via a url-type event custom field. This issue has a CVSS score of 8.6, indicating high severity. The vulnerability allows attackers to inject malicious content, potentially impacting user sessions or data. Defenders should assess exposure and prioritize patching or mitigation. The iCagenda extension is widely used in Joomla installations, increasing the potential impact of this vulnerability.

Vendor
iCagenda
Product
iCagenda Joomla extension
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-28
Original CVE updated
2026-11-06
Advisory published
2026-10-28
Advisory updated
2026-11-06

Who should care

Defenders responsible for Joomla installations with the iCagenda extension should assess exposure and prioritize patching or mitigation. This includes administrators, security teams, and IT personnel responsible for maintaining Joomla installations. The vulnerability's high severity and potential impact on user sessions or data make it essential for defenders to take immediate action.

Why it matters

Defenders should care about CVE-2026-102790 because it represents a high-severity stored XSS vulnerability in the iCagenda Joomla extension, potentially allowing attackers to inject malicious content and impact user sessions or data.

  • Potential for attacker-controlled content injection
  • Risk of user session hijacking or unauthorized actions
  • Possible impact on user data confidentiality and integrity

Technical summary

The iCagenda Joomla extension is vulnerable to stored XSS via a url-type event custom field in versions 3.2.1 to 4.0.16. This vulnerability allows attackers to inject malicious content, potentially impacting user sessions or data. The vulnerability has a CVSS score of 8.6, indicating high severity. Defenders should prioritize verifying exposure of iCagenda installations and applying patches or mitigations.

Defensive priority

Defenders should prioritize verifying exposure of iCagenda installations and applying patches or mitigations.

Recommended defensive actions

  • Verify iCagenda installations for exposure
  • Apply patches or mitigations
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score and vector. The vulnerability was reported by security researchers and verified by the CVE Program. The iCagenda extension is a popular component in Joomla installations, and this vulnerability affects multiple versions. Defenders should verify exposure of iCagenda installations and apply patches or mitigations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-102790 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-102790

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-102790 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-102790

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.