CVE-2026-33739Public exploitNetwork attack vector

Stored script execution via unescaped table values

Published Mar 27, 2026 · Updated Mar 27, 2026

Stored XSS in FOG Project before 1.5.10.1812 allows remote authenticated users to run scripts when privileged users view management tables. FogPage::_replaceNeeds() passes database-backed record values to buildRow(), where str_replace() inserts them into table-cell templates without HTML escaping. A user with record-management privileges must store a crafted value and a privileged user must open the affected listing; the script can read session data or issue actions in that user's browser.

CVSS severity5.7
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in FOG Project before 1.5.10.1812 allows remote authenticated users to run scripts when privileged users view management tables. FogPage::_replaceNeeds() passes database-backed record values to buildRow(), where str_replace() inserts them into table-cell templates without HTML escaping. A user with record-management privileges must store a crafted value and a privileged user must open the affected listing; the script can read session data or issue actions in that user's browser.

The record

CVE
CVE-2026-33739
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
FOG Project
Product
FOG Project
Classifications
CWE-80, T1539
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=< 1.5.10.1812

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

FOG Project · FOG Projectversion=< 1.5.10.1812

Published CVSS scores

5.7GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1539Steal Web Session Cookie

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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