CISA adds iCagenda and Balbooa file-upload flaws to KEV catalog
Free public brief. The indicators, the detections with Splunk SPL already written (plus Elastic and KQL where they apply), and a Slack alert the next time this touches a vendor you run are in the app — free account, no card.
Two actively exploited file-upload vulnerabilities in iCagenda and Balbooa added to CISA's prioritized patching list.
CISA has added two vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog based on confirmed active exploitation in the wild. CVE-2026-48939 affects iCagenda and CVE-2026-56291 affects Balbooa Forms; both are unrestricted file-upload flaws that allow dangerous file types to be uploaded. These vulnerabilities are classified as high-risk because successful exploitation grants total control of the affected asset post-compromise.
Under Binding Operational Directive (BOD) 26-04, Federal Civilian Executive Branch agencies must prioritize rapid remediation of KEV Catalog vulnerabilities on publicly exposed assets. CISA encourages all organizations, not just federal entities, to adopt risk-based vulnerability management and treat these flaws as urgent patching priorities. Organizations should identify and patch vulnerable instances of iCagenda and Balbooa Forms immediately, and audit systems for potential prior compromise before the patch was applied.
Mentioned in this report
Detection guidance
POST Requests to iCagenda or Balbooa Forms Joomla Components
POST requests to the com_icagenda or com_baforms Joomla components, the interfaces affected by the unrestricted file-upload flaws added to CISA KEV. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.
title: POST Requests to iCagenda or Balbooa Forms Joomla Components
description: Detects POST requests addressed to the iCagenda (com_icagenda) or Balbooa
Forms (com_baforms) Joomla components. Both have unrestricted file-upload flaws
exploited in the wild (CISA KEV). Component names are inferred from the product
names. Review the matched requests for upload tasks or for script file names in
the body or response, and correlate with new script files in web-writable folders.
Hunting-grade rule that needs tuning to the environment.
tags:
- attack.initial-access
- attack.t1190
logsource:
category: webserver
detection:
selection_component:
cs-method: POST
cs-uri-query|contains:
- option=com_icagenda
- option=com_baforms
selection_upload:
cs-uri-query|contains:
- upload
- task=
condition: selection_component and selection_upload
falsepositives:
- Legitimate visitors submitting events or forms through iCagenda or Balbooa Forms
- Authorised vulnerability scanning of the Joomla site
level: medium
id: 9a7e50d0-44c2-5cb6-b77b-d1d962df5e7a
status: experimental
author: Vorant
references:
- https://www.cisa.gov/news-events/alerts/2026/07/10/cisa-adds-two-known-exploited-vulnerabilities-catalog
Web Server Process Writing Script File to Web-Writable Image or Media Directory
A web server or PHP process creating an executable PHP-type file under images or media folders, consistent with a file-upload exploit dropping a webshell. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.
title: Web Server Process Writing Script File to Web-Writable Image or Media Directory
description: Detects a web server or PHP-FPM process creating a PHP-type script (.php,
.phtml, .phar) under images, media or tmp folders of a CMS web root. This is the
typical result of exploiting an unrestricted file-upload flaw such as those in iCagenda
and Balbooa Forms.
tags:
- attack.initial-access
- attack.t1190
logsource:
category: file_event
product: linux
detection:
selection_proc:
Image|contains:
- php-fpm
- /apache2
- /httpd
- /php
selection_path:
TargetFilename|contains:
- /images/
- /media/
- /tmp/
selection_ext:
TargetFilename|endswith:
- .php
- .phtml
- .phar
- .php5
condition: selection_proc and selection_path and selection_ext
falsepositives:
- CMS or extension installers and updaters that unpack PHP files into media folders
- PHP session or cache handlers that write .php cache files under tmp
level: high
id: 02ddef28-94a1-59f0-bdca-eb95505c4d63
status: experimental
author: Vorant
references:
- https://www.cisa.gov/news-events/alerts/2026/07/10/cisa-adds-two-known-exploited-vulnerabilities-catalog
Web Server or PHP Process Spawning Shell With Reconnaissance Commands
Web server or PHP worker spawning a shell that runs recon or download-and-execute commands, indicating post-exploitation through an uploaded webshell. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.
title: Web Server or PHP Process Spawning Shell With Reconnaissance Commands
description: Detects Apache, nginx or PHP-FPM spawning a shell that runs discovery
or download-and-execute commands. This is typical post-exploitation after a file-upload
flaw in a public-facing CMS extension is used to place a webshell.
tags:
- attack.initial-access
- attack.t1190
logsource:
category: process_creation
product: linux
detection:
selection_parent:
ParentImage|contains:
- php-fpm
- /apache2
- /httpd
- /nginx
- /php
selection_child:
Image|endswith:
- /sh
- /bash
- /dash
selection_cmd:
CommandLine|contains:
- whoami
- uname -a
- id;
- /etc/passwd
- curl
- wget
- base64 -d
- /dev/tcp/
condition: selection_parent and selection_child and selection_cmd
falsepositives:
- CMS maintenance scripts that call curl or wget through PHP shell_exec
- Admin diagnostic plugins that run uname or id
level: high
id: 0778cc9b-058f-5197-8acb-5b6bd188492f
status: experimental
author: Vorant
references:
- https://www.cisa.gov/news-events/alerts/2026/07/10/cisa-adds-two-known-exploited-vulnerabilities-catalog
Behavioural rules are generated from public reporting — validate in your environment before deploying.
Source reporting: https://www.cisa.gov/news-events/alerts/2026/07/10/cisa-adds-two-known-exploited-vulnerabilities-catalog
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), the actors and CVEs it names as live profiles, and the vendor research on the same campaign — the primary source the news paraphrased, cited and read directly.
It sits in a corpus of 13,854 reports from 146 sources, 614 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Name the vendors you run and Slack hears about the reports that touch them — about forty a week that are yours, not the four hundred that are not.
Create a free account What it costs