CVE-2012-5873: ARC (aka ARC2) through 2011-12-01 allows reflected XSS via the end_point.php query parameter in an output=html

Q: How do I fix CVE-2012-5873?

arc2: upgrade to newer than 2011-12-01. Exact commands for each OS are on this page.

Q: Is CVE-2012-5873 being exploited?

CVE-2012-5873 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-2012-5873 affect?

CVE-2012-5873 affects arc2. Severity is medium (CVSS 5.3). ARC (aka ARC2) through 2011-12-01 allows reflected XSS via the end_point.php query parameter in an output=htmltab action.

Q: How urgent is CVE-2012-5873?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2012-5873 is a medium-severity flaw (CVSS 5.3) affecting arc2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ARC (aka ARC2) through 2011-12-01 allows reflected XSS via the end_point.php query parameter in an output=htmltab action.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-04-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: arc2 project

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

Am I affected?

Timeline

2023-04-26 00:15 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

arc2 project arc2 UPGRADE

Affected: <= 2011-12-01

Fixed in: newer than 2011-12-01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy arc2 || rpm -q arc2 || arc2 --version

2. UPGRADE to newer than 2011-12-01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arc2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arc2

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-2012-5873?

arc2: upgrade to newer than 2011-12-01. Exact commands for each OS are on this page.

Is CVE-2012-5873 being exploited?

CVE-2012-5873 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-2012-5873 affect?

CVE-2012-5873 affects arc2. Severity is medium (CVSS 5.3). ARC (aka ARC2) through 2011-12-01 allows reflected XSS via the end_point.php query parameter in an output=htmltab action.

How urgent is CVE-2012-5873?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2012-5872 CRITICAL 9.8 UPGRADE ARC (aka ARC2) through 2011-12-01 allows blind SQL Injection in getTriplePatternSQL in ARC2_StoreSelectQueryHa

References

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