CVE-2011-5287: Multiple cross-site scripting (XSS) vulnerabilities in HESK before 2.4.1 allow remote attackers to inject arbi

Q: How do I fix CVE-2011-5287?

hesk: upgrade to newer than 2.4.0. Exact commands for each OS are on this page.

Q: Is CVE-2011-5287 being exploited?

CVE-2011-5287 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2011-5287 affect?

CVE-2011-5287 affects hesk. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in HESK before 2.4.1 allow remote attackers to inject arbitrary web script or HTML via the (1) hesk_settings[tmp_title] or (2) hesklang[ENCODING] parameter to inc/header.inc.php; the heskl

Q: How urgent is CVE-2011-5287?

Priority 35/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2011-5287 is a medium-severity flaw (CVSS 4.3) affecting hesk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in HESK before 2.4.1 allow remote attackers to inject arbitrary web script or HTML via the (1) hesk_settings[tmp_title] or (2) hesklang[ENCODING] parameter to inc/header.inc.php; the hesklang[attempt] parameter to (3) inc/assignment_search.inc.php, (4) inc/attachments.inc.php, (5) inc/common.inc.php, (6) inc/database.inc.php, (7) inc/prepare_ticket_search.inc.php, (8) inc/print_tickets.inc.php,

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-79
Published	2015-01-01
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hesk

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-01-01 02:59 UTCPublished CVE record published
2026-06-16 23:36 UTCUpdated Record last modified

hesk hesk UPGRADE

Affected: <= 2.4.0

Fixed in: newer than 2.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hesk || rpm -q hesk || hesk --version

2. UPGRADE to newer than 2.4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hesk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hesk

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-5287?

hesk: upgrade to newer than 2.4.0. Exact commands for each OS are on this page.

Is CVE-2011-5287 being exploited?

CVE-2011-5287 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-5287 affect?

CVE-2011-5287 affects hesk. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in HESK before 2.4.1 allow remote attackers to inject arbitrary web script or HTML via the (1) hesk_settings[tmp_title] or (2) hesklang[ENCODING] parameter to inc/header.inc.php; the heskl

How urgent is CVE-2011-5287?

Priority 35/100. Public exploit reference

Software pages

PHP vulnerabilities

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References

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