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CVE-2020-13121

25
FAUCET Score

CVE-2020-13121 is an open redirect vulnerability affecting Submitty through version 20.04.01, specifically exploitable during invalid login attempts via the "authentication/login?old=" parameter. Rated as Medium severity (CVSS 6.1), it requires user interaction (UI:R) and could lead to information disclosure (C:L) and integrity impact (I:L) by redirecting users to malicious sites. While not actively exploited (no KEV or Hot List status), a Nuclei template exists, indicating potential for automated scanning and exploitation, though there is no public Metasploit module or ExploitDB entry, and minimal community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 20.04.01CPE matchmatch criteria
cpe:2.3:a:rcos:submitty:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.96%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Nuclei: CVE-2020-13121 · Feb 8, 2022
This CVE's current EPSS score of 0.0296 is in the 94th percentile among its peer group of 26,208 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

github.com / Submitty/Submitty/issues/5265
ExploitIssue TrackingThird Party Advisory