# CVE-2025-55129: Auth bypass in Revive Adserver

> Attackers can impersonate users in Revive Adserver via homoglyphs, potentially leading to account takeover.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Dec 2025
- **Updated:** 2 Dec 2025
- **Also known as:** GHSA-jhq7-888q-jw4m

## What is CVE-2025-55129?

CVE-2025-55129 is a medium-severity authentication bypass vulnerability in Revive Adserver, published on 2 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

HackerOne community member Kassem S.(kassem_s94) has reported that username handling in Revive Adserver was still vulnerable to impersonation attacks after the fix for CVE-2025-52672, via several alternate techniques. Homoglyphs based impersonation has been independently reported by other HackerOne users, such as  itz_hari_ and khoof.

Weakness: CWE-176 (Improper Handling of Unicode Encoding)

## Which versions are affected by CVE-2025-55129?

It affects 1 product.


Products: Aquaplatform Revive Adserver.

## How do I fix CVE-2025-55129?

No fix has been published for CVE-2025-55129 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-55129 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55129 exists.

## Other vulnerabilities in Revive Adserver

- [CVE-2026-21641](https://insights.sbomify.com/CVE-2026-21641/): Missing authorization in Revive Adserver (high 7.1)
- [CVE-2025-55126](https://insights.sbomify.com/CVE-2025-55126/): Cross-site scripting in Revive Adserver (medium 6.5)
- [CVE-2025-55128](https://insights.sbomify.com/CVE-2025-55128/): Denial of service in Revive Adserver (medium 6.5)
- [CVE-2026-21642](https://insights.sbomify.com/CVE-2026-21642/): Cross-site scripting in Revive Adserver (medium 6.1)
- [CVE-2026-21663](https://insights.sbomify.com/CVE-2026-21663/): Cross-site scripting in Revive Adserver (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-55129 and fix it if it is affected.

What it is: CVE-2025-55129 is a medium-severity authentication bypass vulnerability in Revive Adserver, published on 2 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55129 exists.

Affected product: Revive Adserver. 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-2025-55129/ (Markdown: https://insights.sbomify.com/CVE-2025-55129/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-55129
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55129
- OSV: https://osv.dev/vulnerability/CVE-2025-55129

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-55129/
Summaries are generated and may contain mistakes; the official description above is the record.