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CVE-2023-33386

24
FAUCET Score

CVE-2023-33386 is an arbitrary file upload vulnerability affecting MarsCTF 1.2.1, specifically within the background attachment upload interface. This critical vulnerability, rated 9.8 CVSS, allows unauthenticated attackers to remotely execute code with high impact on confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and community discussion is minimal, organizations using MarsCTF 1.2.1 should prioritize patching due to the severe potential consequences.

Impacted Technologies

VendorProductVersion(s)CPE
1.2.1CPE matchmatch criteria
cpe:2.3:a:marsctf_project:marsctf:1.2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.01%
Probability of exploitation in next 30 days
EPSS Percentile
59.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0101 is in the 44th percentile among its peer group of 36,862 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / b1ackc4t/MarsCTF/blob/V1.2.1/src/main/java/com/b1ackc4t/marsctfserver/service/impl/CTFFileServiceImpl.java
Product
github.com / b1ackc4t/MarsCTF/issues/10
ExploitThird Party Advisory