Medium severity · published Nov 14, 2025
CVE-2025-8386
AVEVA Application Server IDE Basic Cross-site Scripting
6.9
CVSS
0.2%
EPSS
No
On KEV
Description
The vulnerability, if exploited, could allow an authenticated miscreant
(with privilege of "aaConfigTools") to tamper with App Objects' help
files and persist a cross-site scripting (XSS) injection that when
executed by a victim user, can result in horizontal or vertical
escalation of privileges. The vulnerability can only be exploited during
config-time operations within the IDE component of Application Server.
Run-time components and operations are not affected.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Application Server · AVEVA
through Versions 2023 R2 SP1 P02 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8386
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-8386
github.com
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsa-25-317-02.json
www.aveva.com
https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin-AVEVA-2025-005.pdf
www.cisa.gov
https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-02