CVE-2021-24916

HIGHNVD 7.57.5—Elevated

7.5

The Qubely WordPress plugin before 1.8.6 allows unauthenticated user to send arbitrary e-mails to arbitrary addresses via the qubely_send_form_data AJAX action.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 97.6%
KEV: Not listed

Published

August 7, 2023

Last Modified

November 21, 2024

References (2)

contact@wpscanhttps://wpscan.com/vulnerability/93b893be-59ad-4500-8edb-9fa7a45304d5
af854a3a-2127-422b-91ae-364da2661108https://wpscan.com/vulnerability/93b893be-59ad-4500-8edb-9fa7a45304d5

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-284Improper Access Control

Data Freshness Timeline

(refreshed 9× in last 7d / 15× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 20:01 UTCEG score recompute
2026-05-24 20:01 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2021/CVE-2021-24916.yaml
First seen Jan 1, 2021
WordPress Qubely < 1.8.6 - Unauthenticated Email Sending
Open source ↗

Frequently asked(5)

What is CVE-2021-24916?

CVE-2021-24916 is a high vulnerability published on August 7, 2023. The Qubely WordPress plugin before 1.8.6 allows unauthenticated user to send arbitrary e-mails to arbitrary addresses via the qubelysendform_data AJAX action.

When was CVE-2021-24916 disclosed?

CVE-2021-24916 was first published in the National Vulnerability Database on August 7, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-24916 actively exploited?

CVE-2021-24916 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-24916?

CVE-2021-24916 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-24916?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-24916, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-24916

Explore →

Is Your Infrastructure Affected by CVE-2021-24916?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-24916

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-24916?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)