What is CVE-2021-3027?

CVE-2021-3027 is a medium-severity vulnerability in Librit Passhport, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2021-03-26.

How severe is CVE-2021-3027?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Librit Passhport

CVE-2021-3027

app/views_mod/user/user.py in LibrIT PaSSHport through 2.5 is affected by LDAP Injection. There is an information leak through the crafting of special queries, escaping the provided search filter because user input gets no sanitization.

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Librit Passhport

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

jorgectf.gitlab.io/disclosure/cve-2021-3027/ (Third Party Advisory)
github.com/LibrIT/passhport/pull/562 (Patch, Third Party Advisory)
github.com/LibrIT/passhport/commit/366b03f607729c4538e91b634ecc57c8398522a1 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3027?: CVE-2021-3027 is a medium-severity vulnerability in Librit Passhport, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2021-03-26.
How severe is CVE-2021-3027?: Medium severity. CVSS v3 base score is 6.5 out of 10.