How severe is CVE-2020-8984?

CVE-2020-8984 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-8984 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8984?

CVE-2020-8984 primarily affects Zend Zendto. In total, 123 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8984?

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-2020-8984 published?

CVE-2020-8984 was published on 2020-03-24 and last updated on 2026-06-17.

CVE-2020-8984

CVE-2020-8984 is a high-severity vulnerability in Zend Zendto with a CVSS 3.x base score of 7.5. 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-346.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Zend Zendto
Published: 2020-03-24
Last modified: 2026-06-17

Description

lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta allowed IP address spoofing via the X-Forwarded-For header.

Frequently asked questions

What is CVE-2020-8984?: lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta allowed IP address spoofing via the X-Forwarded-For header.
How severe is CVE-2020-8984?: CVE-2020-8984 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-8984 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8984?: CVE-2020-8984 primarily affects Zend Zendto. In total, 123 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8984?: 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-2020-8984 published?: CVE-2020-8984 was published on 2020-03-24 and last updated on 2026-06-17.

References

Affected products (123)

cpe:2.3:a:zend:zendto:3.10:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.11:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.12:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.13:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.20:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.51:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.52:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.53:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.54:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.55:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.56-2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.57:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.58:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.59:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.60:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.61:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.62:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.63:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.64:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.65:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.70-2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.71:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.72:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.73:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.74:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.75:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.90:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.91:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.92:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.93:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:3.94:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.00:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.01:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.02:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.03-3:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.05-2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.06-2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.07-1:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.08-4:*:*:*:*:*:*:*
cpe:2.3:a:zend:zendto:4.09-1:*:*:*:*:*:*:*

More vulnerabilities in Zend Zendto

CVE-2020-8986 — Critical (CVSS 9.8): lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta failed to properly check for equality when validating the session…
CVE-2020-8985 — High (CVSS 8.8): ZendTo prior to 5.22-2 Beta allowed reflected XSS and CSRF via the unlock.tpl unlock user functionality.
CVE-2021-27888 — Medium (CVSS 6.1): ZendTo before 6.06-4 Beta allows XSS during the display of a drop-off in which a filename has unexpected characters.
CVE-2018-1000841 — Medium (CVSS 6.1): Zend.To version Prior to 5.15-1 contains a Cross Site Scripting (XSS) vulnerability in The verify.php page that can…
CVE-2013-6808 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in lib/NSSDropoff.php in ZendTo before 4.11-13 allows remote attackers to…

All CVEs affecting Zend Zendto →

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