How severe is CVE-2021-31539?

CVE-2021-31539 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-31539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31539?

CVE-2021-31539 affects Wowza Streaming Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31539?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-31539 published?

CVE-2021-31539 was published on 2021-04-23 and last updated on 2026-06-17.

CVE-2021-31539

CVE-2021-31539 is a medium-severity vulnerability in Wowza Streaming Engine with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-312.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-312
Affected product: Wowza Streaming Engine
Published: 2021-04-23
Last modified: 2026-06-17

Description

Wowza Streaming Engine before 4.8.8.01 (in a default installation) has cleartext passwords stored in the conf/admin.password file. A regular local user is able to read usernames and passwords.

Frequently asked questions

What is CVE-2021-31539?: Wowza Streaming Engine before 4.8.8.01 (in a default installation) has cleartext passwords stored in the conf/admin.password file. A regular local user is able to read usernames and passwords.
How severe is CVE-2021-31539?: CVE-2021-31539 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-31539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31539?: CVE-2021-31539 affects Wowza Streaming Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31539?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31539 published?: CVE-2021-31539 was published on 2021-04-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wowza:streaming_engine:*:*:*:*:*:*:*:*

More vulnerabilities in Wowza Streaming Engine

CVE-2018-7047 — Critical (CVSS 9.8): An issue was discovered in the MBeans Server in Wowza Streaming Engine before 4.7.1. The file system may be read and…
CVE-2024-52053 — Critical (CVSS 9.6): Stored Cross-Site Scripting in the Manager component of Wowza Streaming Engine below 4.9.1 allows an unauthenticated…
CVE-2018-19365 — Critical (CVSS 9.1): The REST API in Wowza Streaming Engine 4.7.4.01 allows traversal of the directory structure and retrieval of a file via…
CVE-2016-20034 — High (CVSS 8.8): Wowza Streaming Engine 4.5.0 contains a privilege escalation vulnerability that allows authenticated read-only users to…
CVE-2020-9004 — High (CVSS 8.8): A remote authenticated authorization-bypass vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any…
CVE-2021-35491 — High (CVSS 8.1): A Cross-Site Request Forgery (CSRF) vulnerability in Wowza Streaming Engine through 4.8.11+5 allows a remote attacker…

All CVEs affecting Wowza Streaming Engine →

Other CWE-312 (Cleartext Storage of Sensitive Information) vulnerabilities

CVE-2022-43757 — Critical (CVSS 9.9): A Cleartext Storage of Sensitive Information vulnerability in SUSE Rancher allows users on managed clusters to gain…
CVE-2021-36782 — Critical (CVSS 9.9): A Cleartext Storage of Sensitive Information vulnerability in SUSE Rancher allows authenticated Cluster Owners, Cluster…
CVE-2020-9045 — Critical (CVSS 9.9): During installation or upgrade to Software House C•CURE 9000 v2.70 and American Dynamics victor Video Management…
CVE-2026-31848 — Critical (CVSS 9.8): Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 uses the ecos_pw cookie for authentication, which…
CVE-2025-65826 — Critical (CVSS 9.8): The mobile application was found to contain stored credentials for the network it was developed on. If an attacker…
CVE-2025-34206 — Critical (CVSS 9.8): Vasion Print (formerly PrinterLogic) Virtual Appliance Host and Application (VA and SaaS deployments) mount host…

Browse all CWE-312 (Cleartext Storage of Sensitive Information) vulnerabilities →