How severe is CVE-2021-24553?

CVE-2021-24553 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-24553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24553?

CVE-2021-24553 affects Timeline Calendar Project Timeline Calendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24553?

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

When was CVE-2021-24553 published?

CVE-2021-24553 was published on 2021-08-23 and last updated on 2026-06-17.

CVE-2021-24553

CVE-2021-24553 is a high-severity vulnerability in Timeline Calendar Project Timeline Calendar with a CVSS 3.x base score of 7.2. 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-89.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Timeline Calendar Project Timeline Calendar
Published: 2021-08-23
Last modified: 2026-06-17

Description

The Timeline Calendar WordPress plugin through 1.2 does not sanitise, validate or escape the edit GET parameter before using it in a SQL statement when editing events, leading to an authenticated SQL injection issue. Other SQL Injections are also present in the plugin

Frequently asked questions

What is CVE-2021-24553?: The Timeline Calendar WordPress plugin through 1.2 does not sanitise, validate or escape the edit GET parameter before using it in a SQL statement when editing events, leading to an authenticated SQL injection issue. Other SQL Injections are also present in the plugin
How severe is CVE-2021-24553?: CVE-2021-24553 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-24553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24553?: CVE-2021-24553 affects Timeline Calendar Project Timeline Calendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24553?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-24553 published?: CVE-2021-24553 was published on 2021-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:timeline_calendar_project:timeline_calendar:*:*:*:*:*:wordpress:*:*

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