How severe is CVE-2020-29547?

CVE-2020-29547 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-29547 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29547?

CVE-2020-29547 affects Citadel Webcit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-29547?

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

When was CVE-2020-29547 published?

CVE-2020-29547 was published on 2023-05-29 and last updated on 2026-06-17.

CVE-2020-29547

CVE-2020-29547 is a medium-severity vulnerability in Citadel Webcit with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Citadel Webcit
Published: 2023-05-29
Last modified: 2026-06-17

Description

An issue was discovered in Citadel through webcit-926. Meddler-in-the-middle attackers can pipeline commands after POP3 STLS, IMAP STARTTLS, or SMTP STARTTLS commands, injecting cleartext commands into an encrypted user session. This can lead to credential disclosure.

Frequently asked questions

What is CVE-2020-29547?: An issue was discovered in Citadel through webcit-926. Meddler-in-the-middle attackers can pipeline commands after POP3 STLS, IMAP STARTTLS, or SMTP STARTTLS commands, injecting cleartext commands into an encrypted user session. This can lead to credential disclosure.
How severe is CVE-2020-29547?: CVE-2020-29547 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-29547 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29547?: CVE-2020-29547 affects Citadel Webcit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-29547?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-29547 published?: CVE-2020-29547 was published on 2023-05-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:citadel:webcit:*:*:*:*:*:*:*:*

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