CVE-2024-29271Public exploitNetwork attack vector

Browser script execution via unescaped action parameter

Published Mar 22, 2024 · Updated Aug 28, 2024

Reflected XSS in givanz VvvebJs before 1.7.7 allows remote attackers to execute script in a victim's browser through save.php. The PHP handler copies the action query parameter into an HTML error message without escaping, allowing injected markup to become executable script. Exploitation requires a victim to follow a crafted link, after which script runs with the page's browser-origin access and can read sensitive data or perform actions available to that session.

CVSS severity6.1
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in givanz VvvebJs before 1.7.7 allows remote attackers to execute script in a victim's browser through save.php. The PHP handler copies the action query parameter into an HTML error message without escaping, allowing injected markup to become executable script. Exploitation requires a victim to follow a crafted link, after which script runs with the page's browser-origin access and can read sensitive data or perform actions available to that session.

The record

CVE
CVE-2024-29271
Published
Mar 22, 2024
Updated
Aug 28, 2024
Vendor
givanz
Product
VvvebJs
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2024Record 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=0 <1.7.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

givanz · VvvebJsversion=0 <1.7.7

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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