CVE-2026-3577Network attack vector

Stored script execution via unescaped backup alias

Published Mar 20, 2026 · Updated Mar 20, 2026

Stored cross-site scripting in Fahad Mahmood's Keep Backup Daily 2.1.2 and earlier allows remote authenticated users to inject scripts. The update_kbd_bkup_alias AJAX action stores the val alias after sanitize_text_field(), then places it in HTML attributes without esc_attr(), leaving double quotes unencoded. Administrator-level access is required to save the alias, and the injected script runs when another administrator opens the backup list.

CVSS severity4.4
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Fahad Mahmood's Keep Backup Daily 2.1.2 and earlier allows remote authenticated users to inject scripts. The update_kbd_bkup_alias AJAX action stores the val alias after sanitize_text_field(), then places it in HTML attributes without esc_attr(), leaving double quotes unencoded. Administrator-level access is required to save the alias, and the injected script runs when another administrator opens the backup list.

The record

CVE
CVE-2026-3577
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
AndroidBubbles
Product
Keep Backup Daily
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=2.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

AndroidBubbles · Keep Backup Dailyversion=* <=2.1.2

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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