# CVE-2025-15039: Account Takeover via Conditional Authentication Script Logic in Multiple WSO2 Products

> Attackers can bypass authentication steps to take over user accounts in WSO2 products when specific conditional authentication scripts are configured.

- **Severity:** Critical 9.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 6 Aug 2026
- **Also known as:** GHSA-76r4-x438-gm5w

## What is CVE-2025-15039?

CVE-2025-15039 is a critical authentication bypass vulnerability in Wso2 Api Manager, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Conditional Authentication (Adaptive Authentication) script does not correctly enforce the completion of all required authentication steps when a specific multi-step pattern involving certain authenticators is configured. This allows an attacker to bypass intermediate authentication challenges by exploiting how the script handles callbacks and re-execution of authentication steps.

Successful exploitation allows a malicious actor to gain unauthorized access to a targeted user account. This vulnerability can only be exploited when all of the following conditions are met: the application login flow contains a specific secondary authenticator, the Conditional Authentication script is configured with particular event callbacks and re-executes an authentication step, the targeted user has one of the impacted authenticators enrolled, and the attacker successfully completes any preceding authentication steps.

Weakness: CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2025-15039?

It affects 9 products.


Products: Wso2 Api Control Plane, Wso2 Api Manager, Wso2 Identity Server, Wso2 Identity Server as Key Manager, Wso2 Open Banking Am, Wso2 Open Banking Iam, Wso2 Open Banking Km, Wso2 Traffic Manager, Wso2 Universal Gateway.

## How do I fix CVE-2025-15039?

No fix has been published for CVE-2025-15039 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-15039 being exploited?

There is no known exploitation of CVE-2025-15039 in the wild and no public exploit code.

## Other vulnerabilities in Wso2 Api Manager

- [CVE-2026-5430](https://insights.sbomify.com/CVE-2026-5430/): WSO2 Multiple Products Path Traversal Vulnerability (critical 10.0, exploited in the wild)
- [CVE-2026-1728](https://insights.sbomify.com/CVE-2026-1728/): Privilege Escalation via System REST APIs in Multiple WSO2 Products Permits Admin Account Takeover (critical 9.8)
- [CVE-2025-9312](https://insights.sbomify.com/CVE-2025-9312/): Improper Certificate-Based Authentication Enforcement in Multiple WSO2 Products (critical 9.8)
- [CVE-2025-10611](https://insights.sbomify.com/CVE-2025-10611/): Potential Broken Access Control in Multiple WSO2 Products via System REST APIs (critical 9.8)
- [CVE-2025-9152](https://insights.sbomify.com/CVE-2025-9152/): Improper Privilege Management in Multiple WSO2 API Manager via keymanager-operations DCR Endpoint (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-15039 and fix it if it is affected.

What it is: CVE-2025-15039 is a critical authentication bypass vulnerability in Wso2 Api Manager, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-15039 in the wild and no public exploit code.

Affected product: Wso2 Api Manager. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-15039/ (Markdown: https://insights.sbomify.com/CVE-2025-15039/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-15039
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-15039
- OSV: https://osv.dev/vulnerability/CVE-2025-15039

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-15039/
Summaries are generated and may contain mistakes; the official description above is the record.