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CVE-2021-44549

24
FAUCET Score

CVE-2021-44549 describes a vulnerability in Apache Sling Commons Messaging Mail versions 1.0, where the SimpleMailService lacks an option to enable server identity checks for shared mail sessions, making it susceptible to "man in the middle" attacks. This vulnerability, rated High (CVSS 7.4), can be exploited remotely with high impact on confidentiality and integrity, though it requires high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.0CPE matchmatch criteria
cpe:2.3:a:apache:sling_commons_messaging_mail:1.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.94%
Probability of exploitation in next 30 days
EPSS Percentile
77.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0194 is in the 35th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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 (14)

mavenpatch availablevia ghsa
Product: org.apache.sling:org.apache.sling.commons.messaging.mailFixed in: 2.0
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.12-RHEL-8Fixed in: jenkins-0:2.462.3.1730119132-3.el8
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.12-RHEL-8Fixed in: jenkins-2-plugins-0:4.12.1730119231-1.el8
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.13-RHEL-8Fixed in: jenkins-0:2.462.3.1729839924-3.el8
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.13-RHEL-8Fixed in: jenkins-2-plugins-0:4.13.1729840148-1.el8
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.14-RHEL-8Fixed in: jenkins-0:2.462.3.1729839727-3.el8
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.14-RHEL-8Fixed in: jenkins-2-plugins-0:4.14.1729839844-1.el8
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.15-RHEL-8Fixed in: jenkins-2-plugins-0:4.15.1729838165-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat build of Quarkus 3.2Fixed in: org.eclipse.angus/angus-mail
View patch
redhatpatch availablevia redhat_api
Product: Red Hat build of Quarkus 3.8Fixed in: org.eclipse.angus/angus-mail
View patch
redhatpatch availablevia redhat_api
Product: OCP-Tools-4.15-RHEL-8Fixed in: jenkins-0:2.462.3.1729837947-3.el8
View patch
redhatno patchvia redhat_api
Product: Red Hat build of Apache Camel for Spring Boot 4Fixed in: org.eclipse.angus/angus-mail
redhatend of lifevia redhat_api
Product: Red Hat build of Apache Camel 4 for Quarkus 3Fixed in: org.eclipse.angus/angus-mail
redhatend of lifevia redhat_api
Product: Red Hat Build of KeycloakFixed in: org.eclipse.angus/angus-mail

Vendor Advisories (2)

redhatCVE-2021-44549Important

angus-mail: Enabling Secure Server Identity Checks for Safer SMTPS Communication

Nov 6, 2023
mavenGHSA-c69w-jj56-834whigh

Improper Certificate Validation and Improper Validation of Certificate with Host Mismatch in Apache Sling Commons Messaging Mail

Dec 16, 2021

References

lists.apache.org / thread/l8p9h2bqvkj6rhv4w8kzctb817415b7f
Mailing ListVendor Advisory