# CVE-2021-20534: Open redirect in Security Verify Access Docker

> Remote attackers can exploit an open redirect in IBM Security Verify Access Docker to spoof URLs and conduct phishing attacks against victims.

- **Severity:** Medium 4.5 (`CVSS:3.0/I:H/S:U/PR:H/UI:R/C:N/AV:N/A:N/AC:L/RC:C/E:U/RL:O`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Jul 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-pvxf-99cw-ffm7

## What is CVE-2021-20534?

CVE-2021-20534 is a medium-severity vulnerability in Ibm Security Verify Access, published on 15 Jul 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

IBM Security Verify Access Docker 10.0.0 could allow a remote attacker to conduct phishing attacks, using an open redirect attack. By persuading a victim to visit a specially crafted Web site, a remote attacker could exploit this vulnerability to spoof the URL displayed to redirect a user to a malicious Web site that would appear to be trusted. This could allow the attacker to obtain highly sensitive information or conduct further attacks against the victim. IBM X-Force ID: 198814

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2021-20534?

It affects 1 product.


Products: Ibm Security Verify Access.

## How do I fix CVE-2021-20534?

No fix has been published for CVE-2021-20534 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20534 being exploited?

There is no known exploitation of CVE-2021-20534 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Security Verify Access

- [CVE-2026-78401](https://insights.sbomify.com/CVE-2026-78401/): Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access (critical 9.8)
- [CVE-2026-78406](https://insights.sbomify.com/CVE-2026-78406/): Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access (critical 9.8)
- [CVE-2024-49803](https://insights.sbomify.com/CVE-2024-49803/): IBM Security Verify Access Appliance command execution (critical 9.8)
- [CVE-2021-39070](https://insights.sbomify.com/CVE-2021-39070/): Auth bypass in n/a (critical 9.8)
- [CVE-2024-49805](https://insights.sbomify.com/CVE-2024-49805/): IBM Security Verify Access Appliance hard coded credentials (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20534 and fix it if it is affected.

What it is: CVE-2021-20534 is a medium-severity vulnerability in Ibm Security Verify Access, published on 15 Jul 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-20534 in the wild and no public exploit code.

Affected product: Ibm Security Verify Access. 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-2021-20534/ (Markdown: https://insights.sbomify.com/CVE-2021-20534/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20534
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20534
- OSV: https://osv.dev/vulnerability/CVE-2021-20534

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-20534/
Summaries are generated and may contain mistakes; the official description above is the record.