Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-33038

24
FAUCET Score

CVE-2021-33038 describes a vulnerability in HyperKitty versions up to 1.3.4, specifically within the management/commands/hyperkitty_import.py script. During the import of private mailing list archives, these archives are temporarily exposed publicly, potentially revealing sensitive information for the duration of the import process. This vulnerability has a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and high confidentiality impact, requiring no user interaction or privileges. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.4CPE matchmatch criteria
cpe:2.3:a:hyperkitty_project:hyperkitty:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.86%
Probability of exploitation in next 30 days
EPSS Percentile
77.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0186 is in the 60th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: HyperKittyFixed in: 1.3.5

Vendor Advisories (1)

pipGHSA-h39g-q63v-4h9phigh

Exposure of sensitive information to an unauthorized actor in HyperKitty

Jun 1, 2021

References

gitlab.com / mailman/hyperkitty/-/commit/9025324597d60b2dff740e49b70b15589d6804fa
PatchThird Party Advisory
gitlab.com / mailman/hyperkitty/-/issues/380
ExploitIssue TrackingPatchThird Party Advisory
techblog.wikimedia.org / 2021/06/11/discovering-and-fixing-cve-2021-33038-in-mailman3
PatchThird Party Advisory
debian.org / security/2021/dsa-4922
Third Party Advisory