CVE-2026-27503Network attack vector

Administrator-context script execution via unescaped search input

Published Feb 20, 2026 · Updated Feb 20, 2026

Reflected XSS in admin/log.php in SA2BLV SVXportal 2.5 and earlier allows remote attackers to execute script in an administrator's browser. The page writes the search query parameter directly into an HTML input value attribute without HTML attribute encoding. Exploitation requires an administrator to open a crafted URL and enables session-data theft or forged administrative actions in that browser context.

CVSS severity5.1
Medium
EPSS probability0.15%
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 admin/log.php in SA2BLV SVXportal 2.5 and earlier allows remote attackers to execute script in an administrator's browser. The page writes the search query parameter directly into an HTML input value attribute without HTML attribute encoding. Exploitation requires an administrator to open a crafted URL and enables session-data theft or forged administrative actions in that browser context.

The record

CVE
CVE-2026-27503
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
SA2BLV
Product
SVXportal
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 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=0 <=2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SA2BLV · SVXportalversion=0 <=2.5

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1VulnCheckCVSS: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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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