CVE-2021-36777

Name: CVE-2021-36777
Creator: NVD / NIST
Published: 2022-03-09T17:15:09.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-36777 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A Reliance on Untrusted Inputs in a Security Decision vulnerability in the login proxy of the openSUSE Build service allowed attackers to present users with a expected login form that then sends the clear text credentials to an attacker specified server. This issue affects: openSUSE Build service login-proxy-scripts versions prior to dc000cdfe9b9b715fb92195b1a57559362f689ef.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

A Reliance on Untrusted Inputs in a Security Decision vulnerability in the login proxy of the openSUSE Build service allowed attackers to present users with a expected login form that then sends the clear text credentials to an attacker specified server. This issue affects: openSUSE Build service login-proxy-scripts versions prior to dc000cdfe9b9b715fb92195b1a57559362f689ef.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.90%

54.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-807

Affected Software

Vendor	Product	Versions
Opensuse	Open Build Service	< 2021-10-08

References

https://bugzilla.suse.com/show_bug.cgi?id=1191209Exploit, Issue Tracking, Patch, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1191209Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Mar 9, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36777?

How severe is CVE-2021-36777?

CVE-2021-36777 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36777?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36777?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST