Is CVE-2021-33515 in the CISA KEV catalog?

No. CVE-2021-33515 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33515?

CVE-2021-33515 has a CVSS v3 base score of 4.8 (MEDIUM).

What is the EPSS score for CVE-2021-33515?

CVE-2021-33515 has an EPSS score of 2.84% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33515?

Upgrade dovecot on debian 11 to 1:2.3.13+dfsg1-2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-33515

MEDIUMEPSS 85th pctl

4.8

CVSS v3

NVD

Description

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.

CWE-77Command Injection

How to fix

Remediation Available

dovecotDebian

Fixed in:1:2.3.13+dfsg1-2CVE-2021-33515

dovecotUbuntu

Fixed in:1:2.3.7.2-1ubuntu3.4USN-4993-1

dovecot-coreUbuntu

Fixed in:1:2.3.7.2-1ubuntu3.4USN-4993-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

2.84%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Vendor Advisory1

dovecot.org

Third-Party Advisory3

Other references2

Related Vulnerabilities

Other CWE-77 (Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2024-21887	Critical	9.1	100%	KEV + Ransom	-
CVE-2023-1671	Critical	9.8	100%	KEV	Fix
CVE-2023-1389	High	8.8	100%	KEV	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2012-1823	Critical	9.8	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.