CVE-2025-27380VulnerabilityPublished 22 Jan 2026

CVE-2025-27380: Altium AES · Cross-Site Scripting

Affects Altium AESSource CVE Database V5

Not known to be exploited · CVSS 7.6 High : upgrade to 7.0.6 soon.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

7.6High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 7.0.6

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Changed
Confidentiality: High
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 22 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Altium AES to 7.0.6.

Affected software

Product	Affected	Fixed in
AltiumAES	Affected >=7.0.3 <7.0.6	Fixed in 7.0.6

AI-suggested

To mitigate this vulnerability, European organizations should prioritize upgrading Altium AES to a patched version once available. In the absence of an official patch, implement strict input validation and sanitization on all user-supplied content in the Project Release feature to prevent HTML/JavaScript injection. Restrict permissions to minimize the number of users who can create or modify Project Release content. Employ Content Security Policy (CSP) headers to reduce the impact of injected scripts. Conduct regular security awareness training to reduce the risk of users interacting with malicious content. Monitor AES logs and network traffic for unusual activity indicative of exploitation attempts. Consider isolating AES environments and enforcing multi-factor authentication to reduce the risk of credential compromise. Finally, coordinate with Altium support for any available workarounds or interim security controls.

Description

CVE-2025-27380 is a high-severity cross-site scripting (XSS) vulnerability in Altium Enterprise Server (AES) version 7.0.3. It allows an authenticated attacker to inject malicious HTML/JavaScript into the Project Release feature, which executes in the context of other users' browsers. Exploitation requires user interaction and authentication but can lead to high confidentiality impact by stealing session tokens or sensitive data. The vulnerability affects all platforms running AES 7.0.3 and has a CVSS score of 7.6. No known public exploits exist yet, but the vulnerability's scope and impact warrant prompt mitigation.

Impact

For European organizations, the impact of this vulnerability can be substantial, particularly for those in the electronics design, manufacturing, and engineering sectors that rely on Altium AES for project management and collaboration. Successful exploitation could lead to unauthorized disclosure of sensitive design data, intellectual property theft, and potential lateral movement within corporate networks. The confidentiality impact is high as attackers can steal session tokens or sensitive information via malicious scripts. Integrity impact is lower but still present, as attackers might perform limited unauthorized actions within the AES interface. Availability is not affected. The requirement for authentication and user interaction somewhat limits the attack surface but does not eliminate risk, especially in environments with many users and complex workflows. European companies with collaborative teams and remote access to AES are particularly vulnerable. The breach of sensitive design data could have downstream effects on product security, compliance with EU data protection regulations, and competitive positioning.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

altium.com/platform/security-compliance/security-advisories (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Jan 2026, 08:43 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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