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CVE Record

CVE-2020-15594: An SSRF issue was discovered in Zoho Application Control Plus before version 10.0.511.

An SSRF issue was discovered in Zoho Application Control Plus before version 10.0.511. The mail gateway configuration feature allows an attacker to perform a scan in order to discover open ports on a machine as well as available machines on the network segment on which the instance of the product is deployed.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-15594 is a medium-severity server-side request forgery issue in Zoho Application Control Plus before 10.0.511. A logged-in attacker could misuse the mail gateway configuration feature to make the server probe internal systems, helping map open ports and reachable machines on the product’s network segment.

Executive priority

Treat this as a timely patch-and-hardening item, especially for internet-accessible or broadly delegated deployments. It is not cited as actively exploited, but it can expose internal network structure that attackers value.

Technical view

The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, score 4.3. The issue affects the mail gateway configuration feature and enables internal network reconnaissance through SSRF behavior. Sources do not provide CWE mapping, exploit details, or complete CPE-based affected-product metadata.

Likely exposure

Exposure is most relevant where Zoho Application Control Plus is deployed below version 10.0.511 and low-privileged users can access mail gateway configuration. Risk increases if the instance can reach sensitive internal networks.

Exploitation context

The source bundle does not report active exploitation, and CISA KEV status is false. The described impact is internal discovery, not direct code execution or data modification, but it can support follow-on attacks by revealing reachable hosts and ports.

Researcher notes

The public record identifies Zoho Application Control Plus before 10.0.511 and the mail gateway configuration feature. Evidence is limited on affected CPEs, exact vulnerable parameters, and exploit availability, so validation should focus on version, permissions, and network egress rather than offensive reproduction.

Mitigation direction

  • Upgrade Zoho Application Control Plus to 10.0.511 or later, following vendor guidance.
  • Restrict access to mail gateway configuration to trusted administrative users.
  • Limit outbound network reachability from the Application Control Plus server.
  • Segment the server away from sensitive internal management networks.
  • Review vendor advisories for any additional hardening or upgrade instructions.

Validation and detection

  • Inventory all Zoho Application Control Plus instances and confirm installed versions.
  • Review role permissions for access to mail gateway configuration.
  • Check server egress rules for unnecessary internal network reachability.
  • Review logs for unusual mail gateway configuration activity or internal probing indicators.
  • Confirm remediation against the cited advisory version threshold.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Cloud metadata behavior lookup

The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2020-15594 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.1MediumCVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2020-15594Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.