How severe is CVE-2024-21733?

CVE-2024-21733 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-21733 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21733?

CVE-2024-21733 primarily affects Apache Tomcat. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-21733?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-21733 have an EU (EUVD) identifier?

Yes. CVE-2024-21733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0340.

When was CVE-2024-21733 published?

CVE-2024-21733 was published on 2024-01-19 and last updated on 2026-06-17.

CVE-2024-21733

CVE-2024-21733 is a medium-severity vulnerability in Apache Tomcat with a CVSS 3.x base score of 5.3. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-209.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0340
Weakness: CWE-209
Affected product: Apache Tomcat
Published: 2024-01-19
Last modified: 2026-06-17

Description

Generation of Error Message Containing Sensitive Information vulnerability in Apache Tomcat.This issue affects Apache Tomcat: from 8.5.7 through 8.5.63, from 9.0.0-M11 through 9.0.43. Other, EOL versions may also be affected. Users are recommended to upgrade to version 8.5.64 onwards or 9.0.44 onwards, which contain a fix for the issue.

Frequently asked questions

What is CVE-2024-21733?: Generation of Error Message Containing Sensitive Information vulnerability in Apache Tomcat.This issue affects Apache Tomcat: from 8.5.7 through 8.5.63, from 9.0.0-M11 through 9.0.43. Other, EOL versions may also be affected. Users are recommended to upgrade to version 8.5.64 onwards or 9.0.44 onwards, which contain a fix for the issue.
How severe is CVE-2024-21733?: CVE-2024-21733 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-21733 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21733?: CVE-2024-21733 primarily affects Apache Tomcat. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-21733?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21733 have an EU (EUVD) identifier?: Yes. CVE-2024-21733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0340.
When was CVE-2024-21733 published?: CVE-2024-21733 was published on 2024-01-19 and last updated on 2026-06-17.

References

Affected products (18)

cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*

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