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CVE-2021-36777

27
FAUCET Score

CVE-2021-36777 is a high-severity vulnerability affecting the openSUSE Build Service login proxy, specifically versions prior to dc000cdfe9b9b715fb92195b1a57559362f689ef. This flaw, categorized as a Reliance on Untrusted Inputs in a Security Decision (CWE-807), allows attackers to present a deceptive login form that sends user credentials in clear text to an attacker-controlled server. With a CVSS score of 8.8 (High), the vulnerability is network-exploitable with low attack complexity, requiring user interaction, and can lead to high confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021-10-08CPE matchmatch criteria
cpe:2.3:a:opensuse:open_build_service:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
55.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0089 is in the 57th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugzilla.suse.com / show_bug.cgi
ExploitIssue TrackingPatchThird Party Advisory