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CVE Record

CVE-2022-1820: Keep Backup Daily <= 2.0.2 - Reflected Cross-Site Scripting

The Keep Backup Daily plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘t’ parameter in versions up to, and including, 2.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-1820 affects the WordPress Keep Backup Daily plugin through version 2.0.2. A crafted link can cause script to run in a victim’s browser if they click it. This is not a server takeover by itself, but it can expose session-related data or alter browser-visible content.

Executive priority

Treat as a moderate web risk. Prioritize remediation on public WordPress sites, administrator-facing workflows, and sites with logged-in users who may be targeted through phishing.

Technical view

The plugin has reflected cross-site scripting in the t parameter because input was not sufficiently sanitized or output-escaped. The issue is unauthenticated, network-reachable, and requires user interaction. CVSS 3.1 is 6.1 with changed scope and low confidentiality and integrity impact.

Likely exposure

Exposure is limited to WordPress sites with Keep Backup Daily installed at version 2.0.2 or earlier. Sites not using this plugin are not indicated as affected by the provided sources.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires an attacker to persuade a user to open a malicious link that reflects script through the vulnerable parameter.

Researcher notes

Evidence supports reflected XSS via t in Keep Backup Daily through 2.0.2. Do not assume exploitation in the wild from these sources. The provided affected metadata is sparse, so validate exposure against plugin presence and version.

Mitigation direction

  • Inventory WordPress sites for Keep Backup Daily installations.
  • Upgrade beyond version 2.0.2 if a maintained vendor release is available.
  • Disable or remove the plugin if it is unnecessary.
  • Check WordPress plugin and Wordfence guidance for current remediation details.

Validation and detection

  • Confirm whether Keep Backup Daily is installed on each WordPress site.
  • Record the installed plugin version and compare it with the affected range.
  • Review application logs for suspicious requests involving the t parameter.
  • Verify the fixed code sanitizes input and escapes reflected output.
Prepared
Confidence
medium
Sources
6

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.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2022-1820 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
6.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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
5Source 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
6.1CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2022-1820Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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
fahadmahmoodKeep Backup Daily0unaffected
Weakness

CWE details

CWE-79

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