CVE-2022-4876: A vulnerability was found in Kaltura mwEmbed up to 2.96.rc1 and classified as problematic

Q: How do I fix CVE-2022-4876?

mwembed: upgrade to newer than 2.95. Exact commands for each OS are on this page.

Q: Is CVE-2022-4876 being exploited?

CVE-2022-4876 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-2022-4876 affect?

CVE-2022-4876 affects mwembed. Severity is low (CVSS 3.5). A vulnerability was found in Kaltura mwEmbed up to 2.96.rc1 and classified as problematic. This issue affects some unknown processing of the file includes/DefaultSettings.php. The manipulation of the argument HTTP_X_FORWARDED_HOST leads to

Q: How urgent is CVE-2022-4876?

Priority 23/100. No elevated risk signals yet.

Routine

LOW 3.5UPGRADE

CVE-2022-4876 is a low-severity flaw (CVSS 3.5) affecting mwembed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Kaltura mwEmbed up to 2.96.rc1 and classified as problematic. This issue affects some unknown processing of the file includes/DefaultSettings.php. The manipulation of the argument HTTP_X_FORWARDED_HOST leads to cross site scripting. The attack may be initiated remotely. Upgrading to version 2.96.rc2 is able to address this issue. The patch is named 13b8812ebc8c9fa034eed91ab35ba8423a528c0b. It is recommended to upgrade

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-01-04
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: kaltura

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

Am I affected?

Timeline

2023-01-04 23:15 UTCPublished CVE record published
2026-06-17 05:22 UTCUpdated Record last modified

kaltura mwembed UPGRADE

Affected: <= 2.95 · 2.96 rc1

Fixed in: newer than 2.95

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.95 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mwembed

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-2022-4876?

mwembed: upgrade to newer than 2.95. Exact commands for each OS are on this page.

Is CVE-2022-4876 being exploited?

CVE-2022-4876 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-2022-4876 affect?

CVE-2022-4876 affects mwembed. Severity is low (CVSS 3.5). A vulnerability was found in Kaltura mwEmbed up to 2.96.rc1 and classified as problematic. This issue affects some unknown processing of the file includes/DefaultSettings.php. The manipulation of the argument HTTP_X_FORWARDED_HOST leads to

How urgent is CVE-2022-4876?

Priority 23/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2022-4882 LOW 2.6 UPGRADE A vulnerability was found in kaltura mwEmbed up to 2.91

References

← Back to latest CVEs