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TI-2021-15654 Aliases CVE-2021-37845GHSA-hh3j-j42w-mrpm

An issue was discovered in Citadel through webcit-932.

Priority LOW 19Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

An issue was discovered in Citadel through webcit-932. A meddler-in-the-middle attacker can fixate their own session during the cleartext phase before a STARTTLS command (a violation of "The STARTTLS command is only valid in non-authenticated state." in RFC2595). This potentially allows an attacker to cause a victim's e-mail messages to be stored into an attacker's IMAP mailbox, but depends on details of the victim's client behavior.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00665 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:citadel:webcit:*:*:*:*:*:*:*:*up to 932VulnerableCitadel
  • cpe:2.3:a:citadel:webcit:*:*:*:*:*:*:*:* Versions up to 932 Vulnerable ·Citadel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-37845
  2. 2026-10-03 Alias added: GHSA-hh3j-j42w-mrpm

References

Exploit 1

Other 2

  • TI-2020-16824 A Weak Session Management vulnerability in Citadel WebCit through 926 allows… CVSS 3.1CRITICAL 9.8
  • TI-2009-00344 Format string vulnerability in the mini_calendar component in Citadel.org WebCit 7.22… CVSS 2.0HIGH 7.5
  • TI-2007-03705 Cross-site request forgery (CSRF) vulnerability in Webcit before 7.11 allows remote… CVSS 2.0HIGH 7.5
  • TI-2020-16827 An Insecure Direct Object Reference vulnerability in Citadel WebCit through 926 allows… CVSS 3.1MEDIUM 6.5
  • TI-2020-16826 Multiple cross-site scripting (XSS) vulnerabilities in Citadel WebCit through 926 allow… CVSS 3.1MEDIUM 6.1
  • TI-2020-17741 An issue was discovered in Citadel through webcit-926. CVSS 3.1MEDIUM 5.9
See all 8 →

Sources

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