Resource exhaustion in Zammad

CVE-2023-50455

An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the "email address verification" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2023-50455: held from 0.007 to 0.007.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

  • Zammad — versions 6.1.0, 6.2.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-50455?
CVE-2023-50455 is a high-severity vulnerability in Zammad, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2023-12-10.
How severe is CVE-2023-50455?
High severity. CVSS v3 base score is 7.5 out of 10.