How severe is CVE-2021-24355?

CVE-2021-24355 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-24355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24355?

CVE-2021-24355 affects Wpdeveloper Simple 301 Redirects. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24355?

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

When was CVE-2021-24355 published?

CVE-2021-24355 was published on 2021-06-14 and last updated on 2026-06-17.

CVE-2021-24355

CVE-2021-24355 is a medium-severity vulnerability in Wpdeveloper Simple 301 Redirects with a CVSS 3.x base score of 4.3. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Wpdeveloper Simple 301 Redirects
Published: 2021-06-14
Last modified: 2026-06-17

Description

In the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, the lack of capability checks and insufficient nonce check on the AJAX actions, simple301redirects/admin/get_wildcard and simple301redirects/admin/wildcard, made it possible for authenticated users to retrieve and update the wildcard value for redirects.

Frequently asked questions

What is CVE-2021-24355?: In the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, the lack of capability checks and insufficient nonce check on the AJAX actions, simple301redirects/admin/get_wildcard and simple301redirects/admin/wildcard, made it possible for authenticated users to retrieve and update the wildcard value for redirects.
How severe is CVE-2021-24355?: CVE-2021-24355 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-24355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24355?: CVE-2021-24355 affects Wpdeveloper Simple 301 Redirects. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24355?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24355 published?: CVE-2021-24355 was published on 2021-06-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wpdeveloper:simple_301_redirects:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Wpdeveloper Simple 301 Redirects

CVE-2021-24356 — High (CVSS 8.8): In the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4, a lack of capability checks and insufficient…
CVE-2021-24354 — High (CVSS 8.8): A lack of capability checks and insufficient nonce check on the AJAX action in the Simple 301 Redirects by BetterLinks…
CVE-2021-24353 — High (CVSS 8.8): The import_data function of the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4 had no capability or…
CVE-2021-24352 — High (CVSS 8.8): The export_data function of the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4 had no capability or…

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