CVE-2021-44549

mediumpriority · track · 31EPSS 0.021 · 81 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.08% (81st) EPSS

CVSS 5.8 · medium

Is it mine?

36 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-27

Apache Sling Commons Messaging Mail provides a simple layer on top of JavaMail/Jakarta Mail for OSGi to send mails via SMTPS. To reduce the risk of "man in the middle" attacks additional server identity checks must be performed when accessing mail servers. For compatibility reasons these additional checks are disabled by default in JavaMail/Jakarta Mail. The SimpleMailService in Apache Sling Commons Messaging Mail 1.0 lacks an option to enable these checks for the shared mail session. A user could enable these checks nevertheless by accessing the session via the message created by SimpleMessageBuilder and setting the property mail.smtps.ssl.checkserveridentity to true. Apache Sling Commons Messaging Mail 2.0 adds support for enabling server identity checks and these checks are enabled by default. - https://javaee.github.io/javamail/docs/SSLNOTES.txt - https://javaee.github.io/javamail/docs/api/com/sun/mail/smtp/package-summary.html - https://github.com/eclipse-ee4j/mail/issues/429

cvss

Technical severity, 0–10. One row per scoring source.

7.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–7.4

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 5.2

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295USCWE-297US

affected products (36)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Apache Camelall versionscert_bundDEcpe:/a:apache:camel:-
IBM License Metric Toolall versionscert_bundDEcpe:/a:ibm:license_metric_tool:-
IBM SPSSall versionscert_bundDEcpe:/a:ibm:spss:modeler
NetApp ActiveIQ Unified Managerall versionscert_bundDEcpe:/a:netapp:active_iq_unified_manager:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux 7all versionscert_bundDEcpe:/o:redhat:enterprise_linux:7
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
Red Hat Enterprise Linux 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:9
Red Hat Enterprise Linux AIall versionscert_bundDEcpe:/o:redhat:enterprise_linux:ai
Red Hat Enterprise Linux Cryostat 3all versionscert_bundDEcpe:/o:redhat:enterprise_linux:cryostat_3
Red Hat JBoss Data Grid 8all versionscert_bundDEcpe:/a:redhat:jboss_data_grid:8
Red Hat JBoss Enterprise Application Platform <7.4.23all versionscert_bundDE
Red Hat JBoss Enterprise Application Platform <7.4.24all versionscert_bundDE
Red Hat JBoss Enterprise Application Platform Quarkus <3.2.12.SP1all versionscert_bundDE
Red Hat JBoss Enterprise Application Platform Quarkus <3.8.6.SP1all versionscert_bundDE
Red Hat OpenShiftall versionscert_bundDEcpe:/a:redhat:openshift:-
Red Hat OpenShift Serverless Logic <1.35.0all versionscert_bundDE
Red Hat OpenStack 16.2all versionscert_bundDEcpe:/a:redhat:openstack:16.2
Splunk Splunk Enterprise <10.0.1all versionscert_bundDE

showing 20 of 36

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-3147Red Hat Produkte: Mehrere SchwachstellenDeutsch2024-10-10csaf · cert_bundDE
Ein entfernter anonymer Angreifer kann mehrere Schwachstellen in Red Hat-Produkten ausnutzen, um Dateien zu manipulieren, beliebigen Code auszuführen und einen Denial-of-Service-Zustand zu erzeugen.
WID-SEC-W-2024-3302Keycloak: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2024-10-29csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um Informationen offenzulegen.
WID-SEC-W-2024-3347Apache Sling: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2021-12-16csaf · cert_bundDE
Ein entfernter Angreifer kann eine Schwachstelle in Apache Sling ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
GHSA-c69w-jj56-834wImproper Certificate Validation and Improper Validation of Certificate with Host Mismatch in Apache Sling Commons Messaging Mail2021-12-16ghsa · osvUS
Apache Sling Commons Messaging Mail provides a simple layer on top of JavaMail/Jakarta Mail for OSGi to send mails via SMTPS. To reduce the risk of "man in the middle" attacks additional server identity checks must be performed when accessing mail servers. For compatibility reasons these additional checks are disabled by default in JavaMail/Jakarta Mail. The SimpleMailService in Apache Sling Commons Messaging Mail 1.0 lacks an option to enable these checks for the shared mail session. A user could enable these checks nevertheless by accessing the session via the message created by SimpleMessageBuilder and setting the property mail.smtps.ssl.checkserveridentity to true. Apache Sling Commons Messaging Mail 2.0 adds support for enabling server identity checks and these checks are enabled by default. - https://javaee.github.io/javamail/docs/SSLNOTES.txt - https://javaee.github.io/javamail/docs/api/com/sun/mail/smtp/package-summary.html - https://github.com/eclipse-ee4j/mail/issues/429

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund osv NVD CVE.org MITRE

published 2021-12-14modified 2026-06-17

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+1889 more

references (5)

External citations — patches, advisories, analysis.

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