CVE-2020-26799Public exploitNetwork attack vector

Session data theft via unsanitized RSS link

Published Jul 21, 2025 · Updated Jul 21, 2025

Reflected XSS in LuxSoft LuxCal 4.5.2 allows remote attackers to execute JavaScript in a victim's browser through a crafted RSS feed link. The index.php endpoint reflects the rssfeed parameter into its HTML response without properly sanitizing the supplied value. Exploitation requires the victim to follow the crafted link; the resulting script runs in the LuxCal origin and can read exposed session data.

CVSS severity9.8
Critical
EPSS probability0.53%
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 LuxSoft LuxCal 4.5.2 allows remote attackers to execute JavaScript in a victim's browser through a crafted RSS feed link. The index.php endpoint reflects the rssfeed parameter into its HTML response without properly sanitizing the supplied value. Exploitation requires the victim to follow the crafted link; the resulting script runs in the LuxCal origin and can read exposed session data.

The record

CVE
CVE-2020-26799
Published
Jul 21, 2025
Updated
Jul 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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')
T1059.007JavaScript/JScript
T1566.002Spearphishing Link

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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