Public proof of conceptFix available

CVE-2018-6905

Q: Is CVE-2018-6905 actively exploited?

Active exploitation of CVE-2018-6905 has not been confirmed. Its EPSS score was 2.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-6905?

CVE-2018-6905 has a CVSS v3 base score of 4.8 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

A public proof of concept exists; no exploitation attested.

Published2018-04-08
Fixed in9.1.0 · 8.7.11
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The page module in TYPO3 before 8.7.11, and 9.1.0, has XSS via $GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'], as demonstrated by an admin entering a crafted site name during the installation process.

Timeline

dates in UTC

2018-04-0817:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-6905?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-6905?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Typo3

Branch	Affected	Fixed in	Source
9.x	≥ 9.0.0, < 9.1.0	9.1.0	NVD
8.7	< 8.7.11	8.7.11	NVD

typo3/cms

Branch	Affected	Fixed in	Source
9.2	< 9.2.0	9.2.0	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Typo3 to 9.1.0 · 8.7.11

Advisories and patches

forge.typo3.orgPatch · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedpradeepjairamani/TYPO3-XSS-POCdnr6419/CVE-2018-6905

Sources

NVDCVSS 3.04.8read 2026-10-23
NVDCVSS 2.03.5read 2026-10-23
NVDweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score2.2 %2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Published: 2018-04-08
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-6905?

Is CVE-2018-6905 actively exploited?

Active exploitation of CVE-2018-6905 has not been confirmed. Its EPSS score was 2.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-6905?

CVE-2018-6905 has a CVSS v3 base score of 4.8 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

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