CVE-2022-50905: e107 CMS version 3.2.1 contains multiple vulnerabilities that allow cross-site scripting (XSS) attacks

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-50905 is a critical-severity flaw (CVSS 9.8) affecting e107. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

e107 CMS version 3.2.1 contains multiple vulnerabilities that allow cross-site scripting (XSS) attacks. The first vulnerability is a reflected XSS that occurs in the news comment functionality when authenticated users interact with the comment form. An attacker can inject malicious JavaScript code through the URL parameter that gets executed when users click outside the comment field after typing content. The second vulnerability involves an uplo

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-13
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: e107

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-13 23:15 UTCPublished CVE record published
2026-06-17 05:24 UTCUpdated Record last modified

e107 e107 DOWNGRADE

Affected: 3.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2.1

1. Check installed version

apt-cache policy e107 || rpm -q e107 || e107 --version

2. No fixed release: DOWNGRADE to a release before 3.2.1 (Debian / Ubuntu)

apt-cache madison e107 sudo apt install e107=<VERSION_BEFORE_3.2.1> sudo apt-mark hold e107

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list e107 sudo dnf downgrade e107-<VERSION_BEFORE_3.2.1> sudo dnf versionlock add e107

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · jgmenu · FIXED · 4.7.0-1.fc46 · FEDORA-2026-3053ee4399 · source

sudo dnf upgrade --advisory=FEDORA-2026-3053ee4399

Fedora ELN · python-tkrzw · FIXED · 0.1.32-12.eln159 · FEDORA-2026-0161d71544 · source

sudo dnf upgrade --advisory=FEDORA-2026-0161d71544

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.exploit-db.com/exploits/50910

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-2022-50905?

e107: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-50905 being exploited?

CVE-2022-50905 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-2022-50905 affect?

CVE-2022-50905 affects e107. Severity is critical (CVSS 9.8). e107 CMS version 3.2.1 contains multiple vulnerabilities that allow cross-site scripting (XSS) attacks. The first vulnerability is a reflected XSS that occurs in the news comment functionality when authenticated users interact with the comm

How urgent is CVE-2022-50905?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-11941 MEDIUM 5.4 UPGRADE A vulnerability was detected in e107 CMS up to 2.3.3
CVE-2025-61505 MEDIUM 6.5 UPGRADE e107 CMS thru 2.3.3 are vulnerable to insecure deserialization in the `install.php` script
CVE-2022-50939 HIGH 7.2 DOWNGRADE e107 CMS version 3.2.1 contains a critical file upload vulnerability that allows authenticated administrators
CVE-2022-50916 HIGH 7.2 DOWNGRADE e107 CMS version 3.2.1 contains a file upload vulnerability that allows authenticated administrators to overri
CVE-2022-50907 HIGH 7.2 DOWNGRADE e107 CMS version 3.2.1 contains a file upload vulnerability that allows authenticated administrative users to

References

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