CVE-2004-1656: CRLF injection vulnerability in Comersus Shopping Cart 5.0991 allows remote attackers to perform HTTP Response

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MEDIUM 5.0DOWNGRADE

CVE-2004-1656 is a medium-severity flaw (CVSS 5.0) affecting comersus cart. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CRLF injection vulnerability in Comersus Shopping Cart 5.0991 allows remote attackers to perform HTTP Response Splitting attacks to modify expected HTML content from the server via the redirecturl parameter.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2004-09-01
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: comersus open technologies

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

Am I affected?

Timeline

2004-09-01 04:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

comersus open technologies comersus cart DOWNGRADE

Affected: 5.0.991

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.991

1. Check installed version

apt-cache policy comersus-cart || rpm -q comersus-cart || comersus-cart --version

2. No fixed release: DOWNGRADE to a release before 5.0.991 (Debian / Ubuntu)

apt-cache madison comersus-cart sudo apt install comersus-cart=<VERSION_BEFORE_5.0.991> sudo apt-mark hold comersus-cart

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list comersus-cart sudo dnf downgrade comersus-cart-<VERSION_BEFORE_5.0.991> sudo dnf versionlock add comersus-cart

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Comersus Cart 5.0 - HTTP Response Splitting

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-2004-1656?

comersus cart: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1656 being exploited?

CVE-2004-1656 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-2004-1656 affect?

CVE-2004-1656 affects comersus cart. Severity is medium (CVSS 5.0). CRLF injection vulnerability in Comersus Shopping Cart 5.0991 allows remote attackers to perform HTTP Response Splitting attacks to modify expected HTML content from the server via the redirecturl parameter.

How urgent is CVE-2004-1656?

Priority 43/100. Public exploit reference

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CVE-2005-2190 HIGH 7.5 MITIGATE Multiple SQL injection vulnerabilities in Comersus shopping cart allow remote attackers to execute arbitrary S
CVE-2005-1188 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in comersus_searchItem.asp in Comersus 3.90 to 4.51 allows remote att

References

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