CVE-2011-0508 — Cross-site scripting (XSS) vulnerability in system/modules/comments/Comments.php in Contao CMS 2.9.2, and possibly other versions before 2.9.3, allows remote attackers to inject arbitrary web script or HTML via the HTTP X_FORWARDED_FOR header, which is stored by system/libraries/Environment.php but not properly handled by a comments action to main.php

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MEDIUM

Cross-site scripting (XSS) vulnerability in system/modules/comments/Comments.php in Contao CMS 2.9.2, and possibly other versions before 2.9.3, allows remote attackers to inject arbitrary web script or HTML via the HTTP X_FORWARDED_FOR header, which is stored by system/libraries/Environment.php but not properly handled by a comments action to main.php

Published Jan 20, 2011

4.3

MEDIUM

CVSS 2.0

EPSS 1.92%

Description

Cross-site scripting (XSS) vulnerability in system/modules/comments/Comments.php in Contao CMS 2.9.2, and possibly other versions before 2.9.3, allows remote attackers to inject arbitrary web script or HTML via the HTTP X_FORWARDED_FOR header, which is stored by system/libraries/Environment.php but not properly handled by a comments action to main.php.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.92% 0.01920

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01920

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.92% (0.01920)	79.16th	v5 (v2026.06.15)
Jun 15, 2026	1.92% (0.01920)	77.17th	v5 (v2026.06.15)
Mar 17, 2025	0.50% (0.00499)	63.83th	v4 (v2025.03.14)
Dec 12, 2024	0.27% (0.00275)	68.97th	v3 (v2023.03.01)
Feb 8, 2024	0.27% (0.00275)	67.20th	v3 (v2023.03.01)
Mar 7, 2023	0.27% (0.00275)	63.05th	v3 (v2023.03.01)
Mar 6, 2023	1.32% (0.01319)	71.27th	v2 (v2022.01.01)
Feb 23, 2023	1.32% (0.01319)	71.23th	v2 (v2022.01.01)
Apr 1, 2022	1.32% (0.01319)	69.22th	v2 (v2022.01.01)
Feb 4, 2022	1.32% (0.01319)	44.98th	v2 (v2022.01.01)

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (7)

http://dev.contao.org/issues/2751
x_refsource_CONFIRM
http://secunia.com/advisories/42899
third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://www.contao.org/changelog.html
x_refsource_CONFIRMPatch
http://www.contao.org/news/items/contao-2_9_3.html
x_refsource_CONFIRMPatchVendor Advisory
http://www.osvdb.org/70440
vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/archive/1/515691/100/0/threaded
mailing-listx_refsource_BUGTRAQ
https://exchange.xforce.ibmcloud.com/vulnerabilities/64679
vdb-entryx_refsource_XF

Link	Providers	Tags
http://dev.contao.org/issues/2751		x_refsource_CONFIRM
http://secunia.com/advisories/42899		third-party-advisoryx_refsource_SECUNIAVendor Advisory
http://www.contao.org/changelog.html		x_refsource_CONFIRMPatch
http://www.contao.org/news/items/contao-2_9_3.html		x_refsource_CONFIRMPatchVendor Advisory
http://www.osvdb.org/70440		vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/archive/1/515691/100/0/threaded		mailing-listx_refsource_BUGTRAQ
https://exchange.xforce.ibmcloud.com/vulnerabilities/64679		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jan 20, 2011

Updated Aug 6, 2024

Reserved Jan 20, 2011

Link CVE-2011-0508

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-0508

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-0508