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CVE-2021-31272

31
FAUCET Score

CVE-2021-31272 is a critical directory traversal vulnerability in SerenityOS, specifically affecting its tar/unzip functionality before commit 3844e8569689dd476064a0759d704bc64fb3ca2c. This flaw, rated 9.8 CRITICAL, allows an unauthenticated attacker to achieve command execution or privilege escalation with low attack complexity. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 3844e8569689dd476064a0759d704bc64fb3ca2cCPE matchmatch criteria
cpe:2.3:o:serenityos:serenityos:*:*:*:*:*:*:*:*

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
3.17%
Probability of exploitation in next 30 days
EPSS Percentile
86.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0317 is in the 78th percentile among its peer group of 36,862 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / SerenityOS/serenity/issues/3991
Third Party Advisory
github.com / SerenityOS/serenity/issues/3992
Third Party Advisory
github.com / SerenityOS/serenity/pull/5713
Third Party Advisory
github.com / SerenityOS/serenity/pull/5713/commits/3844e8569689dd476064a0759d704bc64fb3ca2c
PatchThird Party Advisory