Medium severity · published Jun 23, 2025
CVE-2025-6499
A vulnerability classified as problematic was found in vstakhov libucl up to 0.9.2
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
A vulnerability classified as problematic was found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_parse_multiline_string of the file src/ucl_parser.c. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libucl · Vstakhov
through 0.9.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6499
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6499
Exploit
https://github.com/user-attachments/files/19825399/libucl_crash.txt
Exploit
https://github.com/vstakhov/libucl/issues/319
Permissions Required
https://vuldb.com/?ctiid.313615
Third Party Advisory
https://vuldb.com/?id.313615
Third Party Advisory
https://vuldb.com/?submit.601011
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