CVE-2003-0870

highpriority · attend · 45EPSS 0.154 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

15.4% (97th) EPSS

CVSS 7.5 · high

Is it mine?

3 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

Heap-based buffer overflow in Opera 7.11 and 7.20 allows remote attackers to execute arbitrary code via an HREF with a large number of escaped characters in the server name.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.06.8mediumAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-23263Opera 7.11/7.20 HREF - Malformed Server Name Heap Corruptionfunctional · exploit_db

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
opera opera browser= 7.11nvdUScpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*
opera opera browser= 7.20nvdUScpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2003-11-17modified 2026-06-16

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Related entries.

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+16123 more

references (8)

External citations — patches, advisories, analysis.

http://archives.neohapsis.com/archives/vulnwatch/2003-q4/0016.html enisa_euvd
http://www.atstake.com/research/advisories/2003/a102003-1.txt enisa_euvd
http://www.securityfocus.com/bid/8853 enisa_euvd
https://exchange.xforce.ibmcloud.com/vulnerabilities/13458 enisa_euvd
http://archives.neohapsis.com/archives/vulnwatch/2003-q4/0016.htmlBroken Linknvd
http://www.atstake.com/research/advisories/2003/a102003-1.txtExploitPatchVendor Advisorynvd
http://www.securityfocus.com/bid/8853Broken LinkExploitPatchThird Party AdvisoryVDB EntryVendor Advisorynvd
https://exchange.xforce.ibmcloud.com/vulnerabilities/13458Third Party AdvisoryVDB Entrynvd

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