CVE Intelligence
High Cross-site scripting

CVE-2026-102790 — Joomla Extension - icagenda.com - Authenticated Stored XSS in iCagenda 4.0.8 to 4.0.12

Joomla Extension - icagenda.com - Stored XSS via url-type event Custom Field in iCagenda 3.2.1 to 4.0.16

Published Oct 28, 2026 · Updated Oct 28, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Joomla

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.3% (30-day exploitation probability)+3
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.28%
ahead of 21% of scored CVEs · Oct 29, 2026
Affects
Icagenda.com
iCagenda extension for Joomla
CVSS base
8.6
High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Icagenda.com iCagenda extension for Joomla).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
  4. Search available logs for exploit probes matching the vulnerability class (cross-site scripting), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Icagenda.com iCagenda extension for Joomla version 3.2.1-4.0.16 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
Low
User interaction
Passive
Scope
X
Confidentiality (vulnerable system)
High
Integrity (vulnerable system)
High
Availability (vulnerable system)
Low
Confidentiality (subsequent)
None
Integrity (subsequent)
None
Availability (subsequent)
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
8.6 CVSS 4.0 High — — security@joomla.org via NIST National Vulnerability Database
8.6 CVSS 4.0 High — — Joomla via CVE Program (cve.org) e CISA ADP
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X (score shown at the top: security@joomla.org)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-79 · Cross-site Scripting (XSS)

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Monitor CSP violation reports and script payloads in reflected parameters.
web/proxy/WAF logsnetwork IDS/IPSapplication logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Source status changed · Received → Deferred
    Oct 28, 2026 · NIST National Vulnerability Database
  • Affected products added · icagenda.com/icagenda extension for joomla
    Oct 28, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 28, 2026
  • CVSS changed · 8.6
    Oct 28, 2026 · NIST National Vulnerability Database
  • Source status changed · → Received
    Oct 28, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 28, 2026 · Alertas do Telegram
  • CVE published
    Oct 28, 2026 · Joomla

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 28, 2026 – Oct 28, 2026
  • 1× Official description updated · Oct 28, 2026 – Oct 28, 2026

References

1 on the record

Elsewhere on this site

Icagenda.com
every CVE for this vendor
Cross-site scripting
same class
CWE-79
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-102799 Joomla Extension - icagenda.com - CSV formula injection in the registrations export in iCagenda 3.5.0 to 4.0.16 1d
  • CVE-2026-75948 Joomla Extension - icagenda.com - Authenticated Stored XSS in iCagenda 4.0.8 to 4.0.12 Aug 20, 2026
  • CVE-2026-71570 Joomla Extension - icagenda.com - ACL bypass allowing arbitrary user enumeration < 2.0.0-4.0.11 Aug 14, 2026
  • CVE-2026-67366 Joomla Extension - icagenda.com - CSRF on frontend registration actions in iCagenda < 2.0.0-4.0.11 Aug 14, 2026
  • CVE-2026-71571 Joomla Extension - icagenda.com - Authenticated SQL injection via unescaped numeric filter in iCagenda < 2.0.0-4.0.11 Aug 14, 2026
  • CVE-2026-67365 Joomla Extension - icagenda.com - Unauthenticated SQL injection in iCagenda < 4.0.0-4.0.11 Aug 14, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-102790 is "Joomla Extension - icagenda.com - Authenticated Stored XSS in iCagenda 4.0.8 to 4.0.12", rated High. It affects iCagenda extension for Joomla (Icagenda.com); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.6 describes technical severity. EPSS 0.28% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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