CVE-2002-1157: Cross-site scripting vulnerability in the mod_ssl Apache module 2.8.9 and earlier, when UseCanonicalName is of

Q: How do I fix CVE-2002-1157?

mod ssl: upgrade to newer than 2.8.9. Exact commands for each OS are on this page.

Q: Is CVE-2002-1157 being exploited?

CVE-2002-1157 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-2002-1157 affect?

CVE-2002-1157 affects mod ssl. Severity is high (CVSS 7.5). Cross-site scripting vulnerability in the mod_ssl Apache module 2.8.9 and earlier, when UseCanonicalName is off and wildcard DNS is enabled, allows remote attackers to execute script as other web site visitors, via the server name in an HTT

Q: How urgent is CVE-2002-1157?

Priority 55/100. High severity; EPSS top 4%: very likely to be exploited; On your watchlist

This week

HIGH 7.5WATCHLISTUPGRADE

CVE-2002-1157 is a high-severity flaw (CVSS 7.5) affecting mod ssl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting vulnerability in the mod_ssl Apache module 2.8.9 and earlier, when UseCanonicalName is off and wildcard DNS is enabled, allows remote attackers to execute script as other web site visitors, via the server name in an HTTPS response on the SSL port, which is used in a self-referencing URL, a different vulnerability than CAN-2002-0840.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	11.1% (top 4%)
CISA exploited list	No
Published	2002-11-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mod ssl

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

Am I affected?

Timeline

2002-11-04 05:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

mod ssl mod ssl UPGRADE

Affected: <= 2.8.9

Fixed in: newer than 2.8.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mod-ssl || rpm -q mod-ssl || mod-ssl --version

2. UPGRADE to newer than 2.8.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mod-ssl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mod-ssl

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-2002-1157?

mod ssl: upgrade to newer than 2.8.9. Exact commands for each OS are on this page.

Is CVE-2002-1157 being exploited?

CVE-2002-1157 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-2002-1157 affect?

CVE-2002-1157 affects mod ssl. Severity is high (CVSS 7.5). Cross-site scripting vulnerability in the mod_ssl Apache module 2.8.9 and earlier, when UseCanonicalName is off and wildcard DNS is enabled, allows remote attackers to execute script as other web site visitors, via the server name in an HTT

How urgent is CVE-2002-1157?

Priority 55/100. High severity; EPSS top 4%: very likely to be exploited; On your watchlist

Related CVEs

CVE-2004-0700 HIGH 7.5 DOWNGRADE MITIGATE Format string vulnerability in the mod_proxy hook functions function in ssl_engine_log.c in mod_ssl before 2.8
CVE-2002-0653 HIGH 7.8 UPGRADE Off-by-one buffer overflow in the ssl_compat_directive function, as called by the rewrite_command hook for mod
CVE-2002-0082 HIGH 7.5 DOWNGRADE DOWNGRADE The dbm and shm session cache code in mod_ssl before 2.8.7-1.3.23, and Apache-SSL before 1.3.22+1.46, does not

References

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