CVE-2026-101127: Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The p

Q: How do I fix CVE-2026-101127?

forms: upgrade to 2.4.3.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-101127 being exploited?

CVE-2026-101127 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-101127 affect?

CVE-2026-101127 affects forms. Severity is critical (CVSS 9.4). Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint validates the uploaded file's extension and detected MIME type, but stores the attacker-supplied origin

Q: How urgent is CVE-2026-101127?

Priority 44/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.4REMOTEUPGRADE

CVE-2026-101127 is a critical-severity flaw (CVSS 9.4) affecting forms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint validates the uploaded file's extension and detected MIME type, but stores the attacker-supplied original multipart filename verbatim in `#__baforms_submissions_attachments.name`. A later anonymous form submission associates that temporary attachment with the newly created submission. When an administrator opens

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-09-29
Last modified	2026-10-06

Publisher (CNA): Joomla! Project · Vendor: balbooa

Last updated 2026-10-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-29 17:17 UTCPublished CVE record published
2026-10-06 16:47 UTCUpdated Record last modified

balbooa forms UPGRADE

Affected: < 2.4.3.4

Fixed in: 2.4.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy forms || rpm -q forms || forms --version

2. UPGRADE to 2.4.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade forms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade forms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-101127?

forms: upgrade to 2.4.3.4. Exact commands for each OS are on this page.

Is CVE-2026-101127 being exploited?

CVE-2026-101127 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-101127 affect?

CVE-2026-101127 affects forms. Severity is critical (CVSS 9.4). Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint validates the uploaded file's extension and detected MIME type, but stores the attacker-supplied origin

How urgent is CVE-2026-101127?

Priority 44/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Joomla vulnerabilities

Related CVEs

CVE-2026-56291 CRITICAL 9.8 EXPLOITED UPGRADE Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability
CVE-2026-101112 MEDIUM 5.3 UPGRADE Joomla Extension - balbooa.com - Unauthorized Deletion of Attachments in Balbooa Forms < 2.4.3.4 - The public
CVE-2026-102425 CRITICAL 10.0 UPGRADE Joomla Extension - balbooa.com - Unauthenticated RCE via field shortcode injection in Balbooa Forms < 2.4.3.4
CVE-2026-102424 HIGH 7.5 UPGRADE Joomla Extension - balbooa.com - Unauthenticated path traversal exfiltrates local files through auto-reply att
CVE-2026-101126 MEDIUM 6.5 UPGRADE Joomla Extension - balbooa.com - File meta data tampering in Balbooa Forms < 2.4.3.4 - The final form submissi

References

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