How severe is CVE-2020-8771?

CVE-2020-8771 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 46% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8771?

CVE-2020-8771 affects Wptimecapsule Wp Time Capsule. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8771?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-8771 published?

CVE-2020-8771 was published on 2020-02-06 and last updated on 2026-06-17.

CVE-2020-8771

CVE-2020-8771 is a critical-severity vulnerability in Wptimecapsule Wp Time Capsule with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 46% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 46% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Wptimecapsule Wp Time Capsule
Published: 2020-02-06
Last modified: 2026-06-17

Description

The Time Capsule plugin before 1.21.16 for WordPress has an authentication bypass. Any request containing IWP_JSON_PREFIX causes the client to be logged in as the first account on the list of administrator accounts.

Frequently asked questions

What is CVE-2020-8771?: The Time Capsule plugin before 1.21.16 for WordPress has an authentication bypass. Any request containing IWP_JSON_PREFIX causes the client to be logged in as the first account on the list of administrator accounts.
How severe is CVE-2020-8771?: CVE-2020-8771 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 46% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8771?: CVE-2020-8771 affects Wptimecapsule Wp Time Capsule. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-8771 published?: CVE-2020-8771 was published on 2020-02-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wptimecapsule:wp_time_capsule:*:*:*:*:*:wordpress:*:*

Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

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