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Fencer Vulns
high 8.3

CVE-2023-49077 json

mailcow-dockerized XSS Vulnerability in Quarantine UI Allows Unauthorized Access and Data Manipulation

published 2023-11-30 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-53096

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Mailcow: dockerized is an open source groupware/email suite based on docker. A Cross-Site Scripting (XSS) vulnerability has been identified within the Quarantine UI of the system. This vulnerability poses a significant threat to administrators who utilize the Quarantine feature. An attacker can send a carefully crafted email containing malicious JavaScript code. This issue has been patched in version 2023-11.

Patch / fix

  • mailcow mailcow:_dockerized 2023-11

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • mailcow mailcow-dockerized

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.