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CVE-2022-4876

22
FAUCET Score

CVE-2022-4876 describes a cross-site scripting (XSS) vulnerability in Kaltura mwEmbed versions up to 2.96.rc1, specifically within the includes/DefaultSettings.php file. This flaw allows remote attackers to inject malicious scripts by manipulating the HTTP_X_FORWARDED_HOST argument. With a CVSS score of 6.1 (Medium), successful exploitation could lead to information disclosure or limited integrity impact, requiring user interaction. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.95CPE matchmatch criteria
cpe:2.3:a:kaltura:mwembed:*:*:*:*:*:*:*:*
2.96CPE matchmatch criteria
cpe:2.3:a:kaltura:mwembed:2.96:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.5LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 43rd percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / kaltura/mwEmbed/commit/13b8812ebc8c9fa034eed91ab35ba8423a528c0b
Patch
github.com / kaltura/mwEmbed/pull/4266
Patch
github.com / kaltura/mwEmbed/releases/tag/v2.96.rc2
Release Notes
vuldb.com
Permissions Required
vuldb.com
Third Party Advisory