What is CVE-2020-5281?

CVE-2020-5281 is a medium-severity vulnerability in Cesnet Perun, classified under LDAP Injection. CVSS score: 6.2/10. Published 2020-03-25.

How severe is CVE-2020-5281?

Medium severity. CVSS v3 base score is 6.2 out of 10.

LDAP Injection in Cesnet Perun

CVE-2020-5281

In Perun before version 3.9.1, VO or group manager can modify configuration of the LDAP extSource to retrieve all from Perun LDAP. Issue is fixed in version 3.9.1 by sanitisation of the input.

Published 2020-03-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.014 (70.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Cesnet Perun — versions < 3.9.1

Weakness classification (CWE)

References

github.com/CESNET/perun/security/advisories/GHSA-gj88-9q3f-72m3 (Third Party Advisory)
github.com/CESNET/perun/pull/2635 (Patch, Third Party Advisory)
github.com/CESNET/perun/commit/ac527bc3225a64208ee5cee59e5918ee360ca039 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-5281?: CVE-2020-5281 is a medium-severity vulnerability in Cesnet Perun, classified under LDAP Injection. CVSS score: 6.2/10. Published 2020-03-25.
How severe is CVE-2020-5281?: Medium severity. CVSS v3 base score is 6.2 out of 10.