CVE-2020-37255
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk48th percentile - higher than 48% of all known CVEs
Summary
The WordPress Time Capsule Plugin version 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWP_JSON_PREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies and access the WordPress dashboard without providing credentials.
Risk Assessment
This vulnerability poses a serious security risk, allowing attackers to take control of the website without needing to log in. It could lead to unauthorized changes to the site content and data breaches.
Recommendation
It is recommended to immediately update the plugin to the latest version to mitigate this vulnerability. Additionally, monitoring access logs for potential attack attempts is advisable.
Related vulnerabilities
- CVE-2026-124917Critical
Sandbox escape vulnerability due to use-after-free in the Widget: Gtk component of Firefox. It may allow bypassing process isolation. The vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
- CVE-2026-124903Critical
A sandbox escape due to a use-after-free exists in the IPC component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
- CVE-2026-124900Critical
A use-after-free in the DOM: Service Workers component of Firefox allows a sandbox escape. The vulnerability was fixed in Firefox 160.
- CVE-2026-124864Critical
Use-after-free vulnerability in the DOM: Service Workers component of Firefox enabling a sandbox escape. It may allow bypassing browser isolation mechanisms. Fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
- CVE-2026-124861Critical
Use-after-free vulnerability in the Audio/Video: cubeb component of Firefox enabling a sandbox escape. It may allow bypassing browser isolation mechanisms. Fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
- CVE-2026-124859Critical
Sandbox escape in the Storage: Cache API component of Firefox caused by incorrect boundary conditions. It may allow bypassing browser isolation mechanisms. Fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
- CVE-2026-124853Critical
A sandbox escape vulnerability due to incorrect boundary conditions exists in the Graphics: Text component of Firefox. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
- CVE-2026-119446Critical
A Session Fixation vulnerability in the CLI login flow in nerves_hub_web allows an unauthenticated attacker to obtain an API token for another user's account via a crafted login link. The confirmation code is only displayed and never compared, so it cannot prove that the confirming person is the one who started the login.
- CVE-2026-60043Critical
An unauthenticated remote attacker can perform an XSS attack on a logged-in backend user, allowing execution of multiple critical system actions such as shutting down the server or restoring an uploaded backup.
- CVE-2026-13312Critical
The described vulnerability could allow an attacker to compromise a system. Technical details are not provided in the description.
Original NVD description (English source)
WordPress Time Capsule Plugin 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWP_JSON_PREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies and access the WordPress dashboard without providing credentials.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS