How severe is CVE-2020-28978?

CVE-2020-28978 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-28978 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28978?

CVE-2020-28978 affects Canto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28978?

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

When was CVE-2020-28978 published?

CVE-2020-28978 was published on 2020-11-30 and last updated on 2026-06-17.

CVE-2020-28978

CVE-2020-28978 is a medium-severity vulnerability in Canto with a CVSS 3.x base score of 5.3. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Canto
Published: 2020-11-30
Last modified: 2026-06-17

Description

The Canto plugin 1.3.0 for WordPress contains blind SSRF vulnerability. It allows an unauthenticated attacker can make a request to any internal and external server via /includes/lib/tree.php?subdomain=SSRF.

Frequently asked questions

What is CVE-2020-28978?: The Canto plugin 1.3.0 for WordPress contains blind SSRF vulnerability. It allows an unauthenticated attacker can make a request to any internal and external server via /includes/lib/tree.php?subdomain=SSRF.
How severe is CVE-2020-28978?: CVE-2020-28978 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-28978 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28978?: CVE-2020-28978 affects Canto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28978?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28978 published?: CVE-2020-28978 was published on 2020-11-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:canto:canto:1.3.0:*:*:*:*:wordpress:*:*

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