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CVE-2023-38855

20
FAUCET Score

CVE-2023-38855 is a buffer overflow vulnerability in libxls versions prior to 1.6.2, specifically within the get_string function in xlstool.c. This flaw allows a remote, unauthenticated attacker to trigger a denial of service or execute arbitrary code by enticing a user to open a specially crafted XLS file. Rated Medium severity with a CVSS score of 6.5, it requires user interaction but has low attack complexity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.6.2CPE matchmatch criteria
cpe:2.3:a:libxls_project:libxls:1.6.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
52.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 59th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Vendor Advisories (1)

redhatCVE-2023-38855

libxls: heap buffer overflow in xls_parseWorkBook() in xls.c

Aug 15, 2023

References

github.com / libxls/libxls/issues/124
ExploitIssue Tracking