How severe is CVE-2020-27742?

CVE-2020-27742 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-27742 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27742?

CVE-2020-27742 affects Citadel Webcit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27742?

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

When was CVE-2020-27742 published?

CVE-2020-27742 was published on 2020-10-28 and last updated on 2026-06-17.

CVE-2020-27742

CVE-2020-27742 is a medium-severity vulnerability in Citadel Webcit with a CVSS 3.x base score of 6.5. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Citadel Webcit
Published: 2020-10-28
Last modified: 2026-06-17

Description

An Insecure Direct Object Reference vulnerability in Citadel WebCit through 926 allows authenticated remote attackers to read someone else's emails via the msg_confirm_move template. NOTE: this was reported to the vendor in a publicly archived "Multiple Security Vulnerabilities in WebCit 926" thread.

Frequently asked questions

What is CVE-2020-27742?: An Insecure Direct Object Reference vulnerability in Citadel WebCit through 926 allows authenticated remote attackers to read someone else's emails via the msg_confirm_move template. NOTE: this was reported to the vendor in a publicly archived "Multiple Security Vulnerabilities in WebCit 926" thread.
How severe is CVE-2020-27742?: CVE-2020-27742 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-27742 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27742?: CVE-2020-27742 affects Citadel Webcit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27742?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-27742 published?: CVE-2020-27742 was published on 2020-10-28 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Citadel Webcit

CVE-2020-27739 — Critical (CVSS 9.8): A Weak Session Management vulnerability in Citadel WebCit through 926 allows unauthenticated remote attackers to hijack…
CVE-2009-0364 — High (CVSS 7.5): Format string vulnerability in the mini_calendar component in Citadel.org WebCit 7.22, and other versions before 7.39,…
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CVE-2020-27741 — Medium (CVSS 6.1): Multiple cross-site scripting (XSS) vulnerabilities in Citadel WebCit through 926 allow remote attackers to inject…
CVE-2020-29547 — Medium (CVSS 5.9): An issue was discovered in Citadel through webcit-926. Meddler-in-the-middle attackers can pipeline commands after POP3…
CVE-2020-27740 — Medium (CVSS 5.3): Citadel WebCit through 926 allows unauthenticated remote attackers to enumerate valid users within the platform. NOTE:…

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